31674940 has 24 divisors (see below), whose sum is σ = 72564912. Its totient is φ = 11518080.

The previous prime is 31674847. The next prime is 31674941. The reversal of 31674940 is 4947613.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31674896 and 31674905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31674941) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 71769 + ... + 72208.

It is an arithmetic number, because the mean of its divisors is an integer number (3023538).

Almost surely, 2^31674940 is an apocalyptic number.

It is an amenable number.

31674940 is an abundant number, since it is smaller than the sum of its proper divisors (40889972).

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

31674940 is a wasteful number, since it uses less digits than its factorization.

31674940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143997 (or 143995 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 31674940 is about 5628.0493956610. The cubic root of 31674940 is about 316.4015484918.

The spelling of 31674940 in words is "thirty-one million, six hundred seventy-four thousand, nine hundred forty".