28865612 has 6 divisors (see below), whose sum is σ = 50514828. Its totient is φ = 14432804.

The previous prime is 28865597. The next prime is 28865623. The reversal of 28865612 is 21656882.

It is a super-2 number, since 2×28865612² = 1666447112269088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608198 + ... + 3608205.

It is an arithmetic number, because the mean of its divisors is an integer number (8419138).

Almost surely, 2^28865612 is an apocalyptic number.

It is an amenable number.

28865612 is a deficient number, since it is larger than the sum of its proper divisors (21649216).

28865612 is a wasteful number, since it uses less digits than its factorization.

28865612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7216407 (or 7216405 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 28865612 is about 5372.6727054605. The cubic root of 28865612 is about 306.7563699985.

The spelling of 28865612 in words is "twenty-eight million, eight hundred sixty-five thousand, six hundred twelve".