28113604 has 6 divisors (see below), whose sum is σ = 49198814. Its totient is φ = 14056800.

The previous prime is 28113601. The next prime is 28113611. The reversal of 28113604 is 40631182.

It can be written as a sum of positive squares in only one way, i.e., 25704900 + 2408704 = 5070^2 + 1552^2 .

It is not an unprimeable number, because it can be changed into a prime (28113601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3514197 + ... + 3514204.

Almost surely, 2^28113604 is an apocalyptic number.

It is an amenable number.

28113604 is a deficient number, since it is larger than the sum of its proper divisors (21085210).

28113604 is a wasteful number, since it uses less digits than its factorization.

28113604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7028405 (or 7028403 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 28113604 is about 5302.2263248564. The cubic root of 28113604 is about 304.0690199934.

Adding to 28113604 its reverse (40631182), we get a palindrome (68744786).

The spelling of 28113604 in words is "twenty-eight million, one hundred thirteen thousand, six hundred four".