28440604 has 12 divisors (see below), whose sum is σ = 51935184. Its totient is φ = 13601984.

The previous prime is 28440583. The next prime is 28440611. The reversal of 28440604 is 40604482.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154477 + ... + 154660.

It is an arithmetic number, because the mean of its divisors is an integer number (4327932).

Almost surely, 2^28440604 is an apocalyptic number.

It is an amenable number.

28440604 is a deficient number, since it is larger than the sum of its proper divisors (23494580).

28440604 is a wasteful number, since it uses less digits than its factorization.

28440604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309164 (or 309162 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 28440604 is about 5332.9732795130. The cubic root of 28440604 is about 305.2433925684.

The spelling of 28440604 in words is "twenty-eight million, four hundred forty thousand, six hundred four".