28615564 has 6 divisors (see below), whose sum is σ = 50077244. Its totient is φ = 14307780.

The previous prime is 28615553. The next prime is 28615589. The reversal of 28615564 is 46551682.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3576942 + ... + 3576949.

Almost surely, 2^28615564 is an apocalyptic number.

It is an amenable number.

28615564 is a deficient number, since it is larger than the sum of its proper divisors (21461680).

28615564 is a wasteful number, since it uses less digits than its factorization.

28615564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7153895 (or 7153893 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 28615564 is about 5349.3517364256. The cubic root of 28615564 is about 305.8680422676.

The spelling of 28615564 in words is "twenty-eight million, six hundred fifteen thousand, five hundred sixty-four".