31307064 has 32 divisors (see below), whose sum is σ = 82872720. Its totient is φ = 9821696.

The previous prime is 31307057. The next prime is 31307077. The reversal of 31307064 is 46070313.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37959 + ... + 38774.

Almost surely, 2^31307064 is an apocalyptic number.

31307064 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31307064 is an abundant number, since it is smaller than the sum of its proper divisors (51565656).

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

31307064 is a wasteful number, since it uses less digits than its factorization.

31307064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76759 (or 76755 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 31307064 is about 5595.2715751785. The cubic root of 31307064 is about 315.1718689196.

Adding to 31307064 its reverse (46070313), we get a palindrome (77377377).

The spelling of 31307064 in words is "thirty-one million, three hundred seven thousand, sixty-four".