78885923400 has 72 divisors (see below), whose sum is σ = 264925232130. Its totient is φ = 21036245760.

The previous prime is 78885923383. The next prime is 78885923407. The reversal of 78885923400 is 432958887.

It is a happy number.

78885923400 is a `hidden beast` number, since 7 + 8 + 8 + 8 + 592 + 3 + 40 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 72631328004 + 6254595396 = 269502^2 + 79086^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (78885923407) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21910957 + ... + 21914556.

Almost surely, 2^78885923400 is an apocalyptic number.

It is an amenable number.

78885923400 is an abundant number, since it is smaller than the sum of its proper divisors (186039308730).

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

78885923400 is a wasteful number, since it uses less digits than its factorization.

78885923400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43825535 (or 43825523 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 78885923400 in words is "seventy-eight billion, eight hundred eighty-five million, nine hundred twenty-three thousand, four hundred".