31168028 has 24 divisors (see below), whose sum is σ = 56306880. Its totient is φ = 15088320.

The previous prime is 31168009. The next prime is 31168031. The reversal of 31168028 is 82086113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15818 + ... + 17678.

It is an arithmetic number, because the mean of its divisors is an integer number (2346120).

Almost surely, 2^31168028 is an apocalyptic number.

It is an amenable number.

31168028 is a deficient number, since it is larger than the sum of its proper divisors (25138852).

31168028 is a wasteful number, since it uses less digits than its factorization.

31168028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997 (or 1995 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 31168028 is about 5582.8333308455. The cubic root of 31168028 is about 314.7046126515.

The spelling of 31168028 in words is "thirty-one million, one hundred sixty-eight thousand, twenty-eight".