78398043948 has 72 divisors (see below), whose sum is σ = 239805794592. Its totient is φ = 21081825792.

The previous prime is 78398043943. The next prime is 78398043989. The reversal of 78398043948 is 84934089387.

78398043948 is a `hidden beast` number, since 7 + 83 + 9 + 80 + 439 + 48 = 666.

It is a super-2 number, since 2×78398043948² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (78398043943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9145815 + ... + 9154382.

It is an arithmetic number, because the mean of its divisors is an integer number (3330636036).

Almost surely, 2^78398043948 is an apocalyptic number.

It is an amenable number.

78398043948 is an abundant number, since it is smaller than the sum of its proper divisors (161407750644).

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

78398043948 is a wasteful number, since it uses less digits than its factorization.

78398043948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18300231 (or 18300226 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 78398043948 in words is "seventy-eight billion, three hundred ninety-eight million, forty-three thousand, nine hundred forty-eight".