28917604 has 12 divisors (see below), whose sum is σ = 51054444. Its totient is φ = 14330624.

The previous prime is 28917593. The next prime is 28917607. The reversal of 28917604 is 40671982.

It can be written as a sum of positive squares in 2 ways, for example, as 6260004 + 22657600 = 2502^2 + 4760^2 .

It is a super-2 number, since 2×28917604² = 1672455642201632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28917607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31537 + ... + 32440.

It is an arithmetic number, because the mean of its divisors is an integer number (4254537).

Almost surely, 2^28917604 is an apocalyptic number.

It is an amenable number.

28917604 is a deficient number, since it is larger than the sum of its proper divisors (22136840).

28917604 is a wasteful number, since it uses less digits than its factorization.

28917604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64094 (or 64092 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28917604 is about 5377.5090887882. The cubic root of 28917604 is about 306.9404334346.

The spelling of 28917604 in words is "twenty-eight million, nine hundred seventeen thousand, six hundred four".