28688104 has 16 divisors (see below), whose sum is σ = 53856000. Its totient is φ = 14326512.

The previous prime is 28688089. The next prime is 28688111. The reversal of 28688104 is 40188682.

It is a super-2 number, since 2×28688104² = 1646014622229632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7047 + ... + 10345.

It is an arithmetic number, because the mean of its divisors is an integer number (3366000).

Almost surely, 2^28688104 is an apocalyptic number.

It is an amenable number.

28688104 is a deficient number, since it is larger than the sum of its proper divisors (25167896).

28688104 is a wasteful number, since it uses less digits than its factorization.

28688104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4392 (or 4388 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 28688104 is about 5356.1277057217. The cubic root of 28688104 is about 306.1262810555.

The spelling of 28688104 in words is "twenty-eight million, six hundred eighty-eight thousand, one hundred four".