31789228 has 12 divisors (see below), whose sum is σ = 56205352. Its totient is φ = 15730560.

The previous prime is 31789217. The next prime is 31789231. The reversal of 31789228 is 82298713.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40578 + ... + 41353.

Almost surely, 2^31789228 is an apocalyptic number.

It is an amenable number.

31789228 is a deficient number, since it is larger than the sum of its proper divisors (24416124).

31789228 is a wasteful number, since it uses less digits than its factorization.

31789228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82032 (or 82030 counting only the distinct ones).

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

The square root of 31789228 is about 5638.1936823774. The cubic root of 31789228 is about 316.7816333560.

The spelling of 31789228 in words is "thirty-one million, seven hundred eighty-nine thousand, two hundred twenty-eight".