28895904 has 36 divisors (see below), whose sum is σ = 82173546. Its totient is φ = 9631872.

The previous prime is 28895887. The next prime is 28895947. The reversal of 28895904 is 40959882.

It can be written as a sum of positive squares in only one way, i.e., 21344400 + 7551504 = 4620^2 + 2748^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28895904.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49879 + ... + 50454.

Almost surely, 2^28895904 is an apocalyptic number.

28895904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28895904 is an abundant number, since it is smaller than the sum of its proper divisors (53277642).

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

28895904 is a wasteful number, since it uses less digits than its factorization.

28895904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100349 (or 100338 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 28895904 is about 5375.4910473370. The cubic root of 28895904 is about 306.8636373746.

The spelling of 28895904 in words is "twenty-eight million, eight hundred ninety-five thousand, nine hundred four".