31070080 has 64 divisors (see below), whose sum is σ = 76071600. Its totient is φ = 12128256.

The previous prime is 31070057. The next prime is 31070089. The reversal of 31070080 is 8007013.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31070089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26956 + ... + 28084.

Almost surely, 2^31070080 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 31070080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38035800).

31070080 is an abundant number, since it is smaller than the sum of its proper divisors (45001520).

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

31070080 is a wasteful number, since it uses less digits than its factorization.

31070080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191 (or 1179 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 31070080 is about 5574.0541798587. The cubic root of 31070080 is about 314.3746053166.

Adding to 31070080 its reverse (8007013), we get a palindrome (39077093).

The spelling of 31070080 in words is "thirty-one million, seventy thousand, eighty".