Search a number
-
+
28827902 = 219758629
BaseRepresentation
bin110110111111…
…0000011111110
32000020121110002
41231332003332
524334443102
62505514302
7500014235
oct155760376
960217402
1028827902
11152aa914
1297a2992
135c8463c
143b85b1c
1527e6902
hex1b7e0fe

28827902 has 8 divisors (see below), whose sum is σ = 45517800. Its totient is φ = 13655304.

The previous prime is 28827893. The next prime is 28827907. The reversal of 28827902 is 20972882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 758629 = 28827902 / (2 + 8 + 8 + 2 + 7 + 9 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28827907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379277 + ... + 379352.

It is an arithmetic number, because the mean of its divisors is an integer number (5689725).

Almost surely, 228827902 is an apocalyptic number.

28827902 is a deficient number, since it is larger than the sum of its proper divisors (16689898).

28827902 is a wasteful number, since it uses less digits than its factorization.

28827902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758650.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28827902 is about 5369.1621320277. The cubic root of 28827902 is about 306.6227297377.

The spelling of 28827902 in words is "twenty-eight million, eight hundred twenty-seven thousand, nine hundred two".

Divisors: 1 2 19 38 758629 1517258 14413951 28827902