28901904 has 40 divisors (see below), whose sum is σ = 79057440. Its totient is φ = 9067008.

The previous prime is 28901881. The next prime is 28901911. The reversal of 28901904 is 40910982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16894 + ... + 18525.

It is an arithmetic number, because the mean of its divisors is an integer number (1976436).

Almost surely, 2^28901904 is an apocalyptic number.

28901904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28901904 is an abundant number, since it is smaller than the sum of its proper divisors (50155536).

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

28901904 is a wasteful number, since it uses less digits than its factorization.

28901904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35447 (or 35441 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 28901904 is about 5376.0491069186. The cubic root of 28901904 is about 306.8848751528.

The spelling of 28901904 in words is "twenty-eight million, nine hundred one thousand, nine hundred four".