31307364 has 144 divisors (see below), whose sum is σ = 94731840. Its totient is φ = 8864640.

The previous prime is 31307363. The next prime is 31307399. The reversal of 31307364 is 46370313.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (31307363) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 428832 + ... + 428904.

It is an arithmetic number, because the mean of its divisors is an integer number (657860).

Almost surely, 2^31307364 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 31307364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47365920).

31307364 is an abundant number, since it is smaller than the sum of its proper divisors (63424476).

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

31307364 is a wasteful number, since it uses less digits than its factorization.

31307364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 31307364 is about 5595.2983834645. The cubic root of 31307364 is about 315.1728756280.

Adding to 31307364 its reverse (46370313), we get a palindrome (77677677).

The spelling of 31307364 in words is "thirty-one million, three hundred seven thousand, three hundred sixty-four".