83978057392 has 40 divisors (see below), whose sum is σ = 165448785600. Its totient is φ = 41286396480.

The previous prime is 83978057297. The next prime is 83978057419. The reversal of 83978057392 is 29375087938.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 83978057392.

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, 130359 + ... + 430057.

It is an arithmetic number, because the mean of its divisors is an integer number (4136219640).

Almost surely, 2^83978057392 is an apocalyptic number.

It is an amenable number.

83978057392 is a deficient number, since it is larger than the sum of its proper divisors (81470728208).

83978057392 is a wasteful number, since it uses less digits than its factorization.

83978057392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300001 (or 299995 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 83978057392 in words is "eighty-three billion, nine hundred seventy-eight million, fifty-seven thousand, three hundred ninety-two".