28904994 has 24 divisors (see below), whose sum is σ = 63423360. Its totient is φ = 9512568.

The previous prime is 28904977. The next prime is 28905053. The reversal of 28904994 is 49940982.

It is an unprimeable number.

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, 8742 + ... + 11585.

It is an arithmetic number, because the mean of its divisors is an integer number (2642640).

Almost surely, 2^28904994 is an apocalyptic number.

28904994 is an abundant number, since it is smaller than the sum of its proper divisors (34518366).

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

28904994 is a wasteful number, since it uses less digits than its factorization.

28904994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20414 (or 20411 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 28904994 is about 5376.3364850054. The cubic root of 28904994 is about 306.8958114620.

The spelling of 28904994 in words is "twenty-eight million, nine hundred four thousand, nine hundred ninety-four".