28400604 has 24 divisors (see below), whose sum is σ = 66879120. Its totient is φ = 9379584.

The previous prime is 28400587. The next prime is 28400621. The reversal of 28400604 is 40600482.

It is an interprime number because it is at equal distance from previous prime (28400587) and next prime (28400621).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9549 + ... + 12164.

It is an arithmetic number, because the mean of its divisors is an integer number (2786630).

Almost surely, 2^28400604 is an apocalyptic number.

It is an amenable number.

28400604 is an abundant number, since it is smaller than the sum of its proper divisors (38478516).

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

28400604 is a wasteful number, since it uses less digits than its factorization.

28400604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21829 (or 21827 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 28400604 is about 5329.2217067786. The cubic root of 28400604 is about 305.1002232665.

The spelling of 28400604 in words is "twenty-eight million, four hundred thousand, six hundred four".