28986804 has 72 divisors (see below), whose sum is σ = 91361088. Its totient is φ = 7528320.

The previous prime is 28986787. The next prime is 28986809. The reversal of 28986804 is 40868982.

It is a happy number.

It is a super-2 number, since 2×28986804² = 1680469612268832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28986804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28986809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2457 + ... + 8000.

It is an arithmetic number, because the mean of its divisors is an integer number (1268904).

Almost surely, 2^28986804 is an apocalyptic number.

It is an amenable number.

28986804 is an abundant number, since it is smaller than the sum of its proper divisors (62374284).

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

28986804 is a wasteful number, since it uses less digits than its factorization.

28986804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10485 (or 10480 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 28986804 is about 5383.9394498824. The cubic root of 28986804 is about 307.1850751620.

The spelling of 28986804 in words is "twenty-eight million, nine hundred eighty-six thousand, eight hundred four".