3913656720 has 80 divisors (see below), whose sum is σ = 12550714560. Its totient is φ = 1007652352.

The previous prime is 3913656713. The next prime is 3913656731. The reversal of 3913656720 is 276563193.

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

It is a super-3 number, since 3×3913656720³ (a number of 30 digits) contains 333 as substring.

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, 274194 + ... + 288113.

It is an arithmetic number, because the mean of its divisors is an integer number (156883932).

Almost surely, 2^3913656720 is an apocalyptic number.

3913656720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3913656720 is an abundant number, since it is smaller than the sum of its proper divisors (8637057840).

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

3913656720 is a wasteful number, since it uses less digits than its factorization.

3913656720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562352 (or 562346 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 3913656720 is about 62559.2256985331. The cubic root of 3913656720 is about 1575.8960846907.

The spelling of 3913656720 in words is "three billion, nine hundred thirteen million, six hundred fifty-six thousand, seven hundred twenty".