Search a number
-
+
28776528 = 24321137491
BaseRepresentation
bin110110111000…
…1100001010000
32000010222222100
41231301201100
524331322103
62504440400
7466411404
oct155614120
960128870
1028776528
1115275260
129779100
135c67141
143b71104
1527d65a3
hex1b71850

28776528 has 120 divisors (see below), whose sum is σ = 90413856. Its totient is φ = 8467200.

The previous prime is 28776521. The next prime is 28776533. The reversal of 28776528 is 82567782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28776521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58363 + ... + 58853.

Almost surely, 228776528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28776528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45206928).

28776528 is an abundant number, since it is smaller than the sum of its proper divisors (61637328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28776528 is a wasteful number, since it uses less digits than its factorization.

28776528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 544 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 28776528 is about 5364.3758257602. The cubic root of 28776528 is about 306.4404780332.

The spelling of 28776528 in words is "twenty-eight million, seven hundred seventy-six thousand, five hundred twenty-eight".

Divisors: 1 2 3 4 6 8 9 11 12 16 18 22 24 33 36 37 44 48 66 72 74 88 99 111 132 144 148 176 198 222 264 296 333 396 407 444 491 528 592 666 792 814 888 982 1221 1332 1473 1584 1628 1776 1964 2442 2664 2946 3256 3663 3928 4419 4884 5328 5401 5892 6512 7326 7856 8838 9768 10802 11784 14652 16203 17676 18167 19536 21604 23568 29304 32406 35352 36334 43208 48609 54501 58608 64812 70704 72668 86416 97218 109002 129624 145336 163503 194436 199837 218004 259248 290672 327006 388872 399674 436008 599511 654012 777744 799348 872016 1199022 1308024 1598696 1798533 2398044 2616048 3197392 3597066 4796088 7194132 9592176 14388264 28776528