28908612 has 36 divisors (see below), whose sum is σ = 73238256. Its totient is φ = 9614640.

The previous prime is 28908601. The next prime is 28908613. The reversal of 28908612 is 21680982.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28908613) 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 11 ways as a sum of consecutive naturals, for example, 29287 + ... + 30257.

It is an arithmetic number, because the mean of its divisors is an integer number (2034396).

Almost surely, 2^28908612 is an apocalyptic number.

It is an amenable number.

28908612 is an abundant number, since it is smaller than the sum of its proper divisors (44329644).

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

28908612 is a wasteful number, since it uses less digits than its factorization.

28908612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808 (or 1803 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 28908612 is about 5376.6729489527. The cubic root of 28908612 is about 306.9086155092.

The spelling of 28908612 in words is "twenty-eight million, nine hundred eight thousand, six hundred twelve".