3978475089320 has 32 divisors (see below), whose sum is σ = 8961204738600. Its totient is φ = 1589677006848.

The previous prime is 3978475089311. The next prime is 3978475089341. The reversal of 3978475089320 is 239805748793.

It can be written as a sum of positive squares in 4 ways, for example, as 725191902724 + 3253283186596 = 851582^2 + 1803686^2 .

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53494529 + ... + 53568848.

Almost surely, 2^{3978475089320} is an apocalyptic number.

It is an amenable number.

3978475089320 is an abundant number, since it is smaller than the sum of its proper divisors (4982729649280).

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

3978475089320 is a wasteful number, since it uses less digits than its factorization.

3978475089320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107064317 (or 107064313 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 65.

The spelling of 3978475089320 in words is "three trillion, nine hundred seventy-eight billion, four hundred seventy-five million, eighty-nine thousand, three hundred twenty".