31264380 has 144 divisors (see below), whose sum is σ = 112519680. Its totient is φ = 7138368.

The previous prime is 31264379. The next prime is 31264403. The reversal of 31264380 is 8346213.

It is a happy number.

31264380 is a `hidden beast` number, since 3 + 12 + 643 + 8 + 0 = 666.

It is a super-2 number, since 2×31264380² = 1954922913568800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 33561 + ... + 34479.

Almost surely, 2^31264380 is an apocalyptic number.

31264380 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 31264380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56259840).

31264380 is an abundant number, since it is smaller than the sum of its proper divisors (81255300).

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

31264380 is a wasteful number, since it uses less digits than its factorization.

31264380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 31264380 is about 5591.4559821213. The cubic root of 31264380 is about 315.0285688375.

The spelling of 31264380 in words is "thirty-one million, two hundred sixty-four thousand, three hundred eighty".