31534940 has 12 divisors (see below), whose sum is σ = 66223416. Its totient is φ = 12613968.

The previous prime is 31534913. The next prime is 31534961. The reversal of 31534940 is 4943513.

It is a super-3 number, since 3×31534940³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788354 + ... + 788393.

It is an arithmetic number, because the mean of its divisors is an integer number (5518618).

Almost surely, 2^31534940 is an apocalyptic number.

It is an amenable number.

31534940 is an abundant number, since it is smaller than the sum of its proper divisors (34688476).

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

31534940 is a wasteful number, since it uses less digits than its factorization.

31534940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576756 (or 1576754 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 31534940 is about 5615.5979200794. The cubic root of 31534940 is about 315.9347058386.

The spelling of 31534940 in words is "thirty-one million, five hundred thirty-four thousand, nine hundred forty".