28317892 has 6 divisors (see below), whose sum is σ = 49556318. Its totient is φ = 14158944.

The previous prime is 28317881. The next prime is 28317907. The reversal of 28317892 is 29871382.

It can be written as a sum of positive squares in only one way, i.e., 27185796 + 1132096 = 5214^2 + 1064^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3539733 + ... + 3539740.

Almost surely, 2^28317892 is an apocalyptic number.

It is an amenable number.

28317892 is a deficient number, since it is larger than the sum of its proper divisors (21238426).

28317892 is a wasteful number, since it uses less digits than its factorization.

28317892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7079477 (or 7079475 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 28317892 is about 5321.4558158459. The cubic root of 28317892 is about 304.8037508465.

Adding to 28317892 its product of digits (48384), we get a square (28366276 = 5326²).

The spelling of 28317892 in words is "twenty-eight million, three hundred seventeen thousand, eight hundred ninety-two".