Search a number
-
+
28610480 = 245438317
BaseRepresentation
bin110110100100…
…0111110110000
31222211120012102
41231020332300
524311013410
62501115532
7465120323
oct155107660
958746172
1028610480
1115171528
1296b8ba8
135c096a2
143b2a7ba
1527a22a5
hex1b48fb0

28610480 has 40 divisors (see below), whose sum is σ = 68074512. Its totient is φ = 11176704.

The previous prime is 28610431. The next prime is 28610503. The reversal of 28610480 is 8401682.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 719 + ... + 7598.

Almost surely, 228610480 is an apocalyptic number.

28610480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28610480 is an abundant number, since it is smaller than the sum of its proper divisors (39464032).

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

28610480 is a wasteful number, since it uses less digits than its factorization.

28610480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8373 (or 8367 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28610480 is about 5348.8765175502. The cubic root of 28610480 is about 305.8499271231.

The spelling of 28610480 in words is "twenty-eight million, six hundred ten thousand, four hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 40 43 80 86 172 215 344 430 688 860 1720 3440 8317 16634 33268 41585 66536 83170 133072 166340 332680 357631 665360 715262 1430524 1788155 2861048 3576310 5722096 7152620 14305240 28610480