78398493876 has 36 divisors (see below), whose sum is σ = 198404752000. Its totient is φ = 26102398608.

The previous prime is 78398493857. The next prime is 78398493893. The reversal of 78398493876 is 67839489387.

78398493876 is a `hidden beast` number, since 78 + 398 + 4 + 93 + 87 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×78398493876² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1236676 + ... + 1298523.

Almost surely, 2^78398493876 is an apocalyptic number.

It is an amenable number.

78398493876 is an abundant number, since it is smaller than the sum of its proper divisors (120006258124).

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

78398493876 is a wasteful number, since it uses less digits than its factorization.

78398493876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536068 (or 2536063 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 72.

The spelling of 78398493876 in words is "seventy-eight billion, three hundred ninety-eight million, four hundred ninety-three thousand, eight hundred seventy-six".