31874140 has 24 divisors (see below), whose sum is σ = 67368672. Its totient is φ = 12667200.

The previous prime is 31874093. The next prime is 31874149. The reversal of 31874140 is 4147813.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 31874099 and 31874108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31874149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1936 + ... + 8215.

It is an arithmetic number, because the mean of its divisors is an integer number (2807028).

Almost surely, 2^31874140 is an apocalyptic number.

It is an amenable number.

31874140 is an abundant number, since it is smaller than the sum of its proper divisors (35494532).

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

31874140 is a wasteful number, since it uses less digits than its factorization.

31874140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317 (or 10315 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 31874140 is about 5645.7187319242. The cubic root of 31874140 is about 317.0634337194.

The spelling of 31874140 in words is "thirty-one million, eight hundred seventy-four thousand, one hundred forty".