31368740 has 96 divisors (see below), whose sum is σ = 77220864. Its totient is φ = 10598400.

The previous prime is 31368721. The next prime is 31368751. The reversal of 31368740 is 4786313.

It is a junction number, because it is equal to n+sod(n) for n = 31368697 and 31368706.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 207665 + ... + 207815.

It is an arithmetic number, because the mean of its divisors is an integer number (804384).

Almost surely, 2^31368740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31368740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38610432).

31368740 is an abundant number, since it is smaller than the sum of its proper divisors (45852124).

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

31368740 is a wasteful number, since it uses less digits than its factorization.

31368740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 31368740 is about 5600.7803027792. The cubic root of 31368740 is about 315.3786996557.

The spelling of 31368740 in words is "thirty-one million, three hundred sixty-eight thousand, seven hundred forty".