31264740 has 144 divisors (see below), whose sum is σ = 105670656. Its totient is φ = 7430400.

The previous prime is 31264711. The next prime is 31264763. The reversal of 31264740 is 4746213.

31264740 is a `hidden beast` number, since 3 + 12 + 647 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72325 + ... + 72755.

It is an arithmetic number, because the mean of its divisors is an integer number (733824).

Almost surely, 2^31264740 is an apocalyptic number.

31264740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31264740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52835328).

31264740 is an abundant number, since it is smaller than the sum of its proper divisors (74405916).

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

31264740 is a wasteful number, since it uses less digits than its factorization.

31264740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 31264740 is about 5591.4881740016. The cubic root of 31264740 is about 315.0297779861.

The spelling of 31264740 in words is "thirty-one million, two hundred sixty-four thousand, seven hundred forty".