28916004 has 24 divisors (see below), whose sum is σ = 72661120. Its totient is φ = 8897184.

The previous prime is 28916003. The next prime is 28916033. The reversal of 28916004 is 40061982.

It is a super-2 number, since 2×28916004² = 1672270574656032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28916003) 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, 92524 + ... + 92835.

Almost surely, 2^28916004 is an apocalyptic number.

It is an amenable number.

28916004 is an abundant number, since it is smaller than the sum of its proper divisors (43745116).

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

28916004 is a wasteful number, since it uses less digits than its factorization.

28916004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185379 (or 185377 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28916004 is about 5377.3603189669. The cubic root of 28916004 is about 306.9347723645.

Adding to 28916004 its reverse (40061982), we get a palindrome (68977986).

The spelling of 28916004 in words is "twenty-eight million, nine hundred sixteen thousand, four".