31673988 has 36 divisors (see below), whose sum is σ = 84280560. Its totient is φ = 10002096.

The previous prime is 31673981. The next prime is 31674001. The reversal of 31673988 is 88937613.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (31673981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22470 + ... + 23837.

Almost surely, 2^31673988 is an apocalyptic number.

31673988 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

31673988 is an abundant number, since it is smaller than the sum of its proper divisors (52606572).

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

31673988 is a wasteful number, since it uses less digits than its factorization.

31673988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46336 (or 46331 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 31673988 is about 5627.9648186534. The cubic root of 31673988 is about 316.3983786117.

The spelling of 31673988 in words is "thirty-one million, six hundred seventy-three thousand, nine hundred eighty-eight".