3963646920 has 64 divisors (see below), whose sum is σ = 12300984000. Its totient is φ = 1020524288.

The previous prime is 3963646901. The next prime is 3963646931. The reversal of 3963646920 is 296463693.

It is a self number, because there is not a number n which added to its sum of digits gives 3963646920.

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, 566010 + ... + 572969.

It is an arithmetic number, because the mean of its divisors is an integer number (192202875).

Almost surely, 2^3963646920 is an apocalyptic number.

3963646920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3963646920 is an abundant number, since it is smaller than the sum of its proper divisors (8337337080).

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

3963646920 is a wasteful number, since it uses less digits than its factorization.

3963646920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139022 (or 1139018 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 48.

The square root of 3963646920 is about 62957.5009033872. The cubic root of 3963646920 is about 1582.5774999543.

The spelling of 3963646920 in words is "three billion, nine hundred sixty-three million, six hundred forty-six thousand, nine hundred twenty".