3979780385328 has 120 divisors (see below), whose sum is σ = 12231937083600. Its totient is φ = 1197900065280.

The previous prime is 3979780385311. The next prime is 3979780385341. The reversal of 3979780385328 is 8235830879793.

3979780385328 is a `hidden beast` number, since 3 + 9 + 7 + 9 + 7 + 80 + 3 + 8 + 532 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8195151 + ... + 8667182.

It is an arithmetic number, because the mean of its divisors is an integer number (101932809030).

Almost surely, 2^{3979780385328} is an apocalyptic number.

It is an amenable number.

3979780385328 is an abundant number, since it is smaller than the sum of its proper divisors (8252156698272).

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

3979780385328 is a wasteful number, since it uses less digits than its factorization.

3979780385328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16862507 (or 16862498 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 72.

The spelling of 3979780385328 in words is "three trillion, nine hundred seventy-nine billion, seven hundred eighty million, three hundred eighty-five thousand, three hundred twenty-eight".