31364340 has 96 divisors (see below), whose sum is σ = 102332160. Its totient is φ = 7028736.

The previous prime is 31364323. The next prime is 31364353. The reversal of 31364340 is 4346313.

It is a self number, because there is not a number n which added to its sum of digits gives 31364340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21556 + ... + 22964.

It is an arithmetic number, because the mean of its divisors is an integer number (1065960).

Almost surely, 2^31364340 is an apocalyptic number.

31364340 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 31364340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51166080).

31364340 is an abundant number, since it is smaller than the sum of its proper divisors (70967820).

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

31364340 is a wasteful number, since it uses less digits than its factorization.

31364340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481 (or 1479 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 31364340 is about 5600.3874865941. The cubic root of 31364340 is about 315.3639532216.

The spelling of 31364340 in words is "thirty-one million, three hundred sixty-four thousand, three hundred forty".