28831912 has 8 divisors (see below), whose sum is σ = 54059850. Its totient is φ = 14415952.

The previous prime is 28831889. The next prime is 28831927. The reversal of 28831912 is 21913882.

It can be written as a sum of positive squares in only one way, i.e., 22410756 + 6421156 = 4734^2 + 2534^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1801987 + ... + 1802002.

Almost surely, 2^28831912 is an apocalyptic number.

It is an amenable number.

28831912 is a deficient number, since it is larger than the sum of its proper divisors (25227938).

28831912 is a wasteful number, since it uses less digits than its factorization.

28831912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603995 (or 3603991 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 28831912 is about 5369.5355478849. The cubic root of 28831912 is about 306.6369462901.

The spelling of 28831912 in words is "twenty-eight million, eight hundred thirty-one thousand, nine hundred twelve".