31307077000 has 32 divisors (see below), whose sum is σ = 73258562520. Its totient is φ = 12522830400.

The previous prime is 31307076961. The next prime is 31307077007. The reversal of 31307077000 is 77070313.

It can be written as a sum of positive squares in 4 ways, for example, as 9978811236 + 21328265764 = 99894^2 + 146042^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31307077000.

It is not an unprimeable number, because it can be changed into a prime (31307077007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15652539 + ... + 15654538.

Almost surely, 2^31307077000 is an apocalyptic number.

It is an amenable number.

31307077000 is an abundant number, since it is smaller than the sum of its proper divisors (41951485520).

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

31307077000 is a wasteful number, since it uses less digits than its factorization.

31307077000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31307098 (or 31307084 counting only the distinct ones).

The product of its (nonzero) digits is 3087, while the sum is 28.

The spelling of 31307077000 in words is "thirty-one billion, three hundred seven million, seventy-seven thousand".