28815604 has 6 divisors (see below), whose sum is σ = 50427314. Its totient is φ = 14407800.

The previous prime is 28815601. The next prime is 28815613. The reversal of 28815604 is 40651882.

It can be written as a sum of positive squares in only one way, i.e., 27583504 + 1232100 = 5252^2 + 1110^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28815604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28815601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3601947 + ... + 3601954.

Almost surely, 2^28815604 is an apocalyptic number.

It is an amenable number.

28815604 is a deficient number, since it is larger than the sum of its proper divisors (21611710).

28815604 is a wasteful number, since it uses less digits than its factorization.

28815604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7203905 (or 7203903 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 28815604 is about 5368.0167659947. The cubic root of 28815604 is about 306.5791217236.

The spelling of 28815604 in words is "twenty-eight million, eight hundred fifteen thousand, six hundred four".