31896228 has 48 divisors (see below), whose sum is σ = 91602560. Its totient is φ = 8411904.

The previous prime is 31896217. The next prime is 31896251. The reversal of 31896228 is 82269813.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13513 + ... + 15696.

Almost surely, 2^31896228 is an apocalyptic number.

It is an amenable number.

31896228 is an abundant number, since it is smaller than the sum of its proper divisors (59706332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31896228 is a wasteful number, since it uses less digits than its factorization.

31896228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29236 (or 29234 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 31896228 is about 5647.6745656952. The cubic root of 31896228 is about 317.1366558784.

The spelling of 31896228 in words is "thirty-one million, eight hundred ninety-six thousand, two hundred twenty-eight".