31634740 has 12 divisors (see below), whose sum is σ = 66432996. Its totient is φ = 12653888.

The previous prime is 31634717. The next prime is 31634749. The reversal of 31634740 is 4743613.

It can be written as a sum of positive squares in 2 ways, for example, as 16048036 + 15586704 = 4006^2 + 3948^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31634699 and 31634708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31634749) 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 3 ways as a sum of consecutive naturals, for example, 790849 + ... + 790888.

It is an arithmetic number, because the mean of its divisors is an integer number (5536083).

Almost surely, 2^31634740 is an apocalyptic number.

It is an amenable number.

31634740 is an abundant number, since it is smaller than the sum of its proper divisors (34798256).

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

31634740 is a wasteful number, since it uses less digits than its factorization.

31634740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581746 (or 1581744 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 31634740 is about 5624.4768645626. The cubic root of 31634740 is about 316.2676389835.

The spelling of 31634740 in words is "thirty-one million, six hundred thirty-four thousand, seven hundred forty".