31964742 has 12 divisors (see below), whose sum is σ = 69256980. Its totient is φ = 10654908.

The previous prime is 31964741. The next prime is 31964753. The reversal of 31964742 is 24746913.

31964742 is a `hidden beast` number, since 3 + 1 + 9 + 647 + 4 + 2 = 666.

It is a super-2 number, since 2×31964742² = 2043489462253128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31964697 and 31964706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31964741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 887892 + ... + 887927.

It is an arithmetic number, because the mean of its divisors is an integer number (5771415).

Almost surely, 2^31964742 is an apocalyptic number.

31964742 is an abundant number, since it is smaller than the sum of its proper divisors (37292238).

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

31964742 is a wasteful number, since it uses less digits than its factorization.

31964742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775827 (or 1775824 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 31964742 is about 5653.7369942366. The cubic root of 31964742 is about 317.3635663217.

The spelling of 31964742 in words is "thirty-one million, nine hundred sixty-four thousand, seven hundred forty-two".