3968218624 has 40 divisors (see below), whose sum is σ = 8143014528. Its totient is φ = 1930475520.

The previous prime is 3968218621. The next prime is 3968218633. The reversal of 3968218624 is 4268128693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3968218621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85792 + ... + 123679.

Almost surely, 2^3968218624 is an apocalyptic number.

It is an amenable number.

3968218624 is an abundant number, since it is smaller than the sum of its proper divisors (4174795904).

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

3968218624 is an equidigital number, since it uses as much as digits as its factorization.

3968218624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209526 (or 209510 counting only the distinct ones).

The product of its digits is 995328, while the sum is 49.

The square root of 3968218624 is about 62993.7982979277. The cubic root of 3968218624 is about 1583.1857189462.

The spelling of 3968218624 in words is "three billion, nine hundred sixty-eight million, two hundred eighteen thousand, six hundred twenty-four".