3181993680 has 80 divisors (see below), whose sum is σ = 10204346880. Its totient is φ = 819270144.

The previous prime is 3181993663. The next prime is 3181993693. The reversal of 3181993680 is 863991813.

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

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221632 + ... + 235551.

It is an arithmetic number, because the mean of its divisors is an integer number (127554336).

Almost surely, 2^3181993680 is an apocalyptic number.

3181993680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3181993680 is an abundant number, since it is smaller than the sum of its proper divisors (7022353200).

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

3181993680 is a wasteful number, since it uses less digits than its factorization.

3181993680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457228 (or 457222 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 3181993680 is about 56409.1630854421. The cubic root of 3181993680 is about 1470.8434051283.

The spelling of 3181993680 in words is "three billion, one hundred eighty-one million, nine hundred ninety-three thousand, six hundred eighty".