3131684880 has 80 divisors (see below), whose sum is σ = 10219197120. Its totient is φ = 791161344.

The previous prime is 3131684849. The next prime is 3131684887. The reversal of 3131684880 is 884861313.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×3131684880² = 19614900375241228800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3131684887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338827 + ... + 347946.

It is an arithmetic number, because the mean of its divisors is an integer number (127739964).

Almost surely, 2^3131684880 is an apocalyptic number.

3131684880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3131684880 is an abundant number, since it is smaller than the sum of its proper divisors (7087512240).

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

3131684880 is a wasteful number, since it uses less digits than its factorization.

3131684880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686808 (or 686802 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 3131684880 is about 55961.4588801972. The cubic root of 3131684880 is about 1463.0506177135.

The spelling of 3131684880 in words is "three billion, one hundred thirty-one million, six hundred eighty-four thousand, eight hundred eighty".