28904974 has 16 divisors (see below), whose sum is σ = 51706368. Its totient is φ = 11849112.

The previous prime is 28904969. The next prime is 28904977. The reversal of 28904974 is 47940982.

It is a self number, because there is not a number n which added to its sum of digits gives 28904974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28904977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44562 + ... + 45205.

It is an arithmetic number, because the mean of its divisors is an integer number (3231648).

Almost surely, 2^28904974 is an apocalyptic number.

28904974 is a deficient number, since it is larger than the sum of its proper divisors (22801394).

28904974 is a wasteful number, since it uses less digits than its factorization.

28904974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89799.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28904974 is about 5376.3346250024. The cubic root of 28904974 is about 306.8957406793.

The spelling of 28904974 in words is "twenty-eight million, nine hundred four thousand, nine hundred seventy-four".