78499238400 has 600 divisors, whose sum is σ = 316989447984. Its totient is φ = 19027353600.

The previous prime is 78499238387. The next prime is 78499238417. The reversal of 78499238400 is 483299487.

78499238400 is a `hidden beast` number, since 78 + 499 + 2 + 3 + 84 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (600).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 11401359 + ... + 11408241.

Almost surely, 2^78499238400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78499238400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158494723992).

78499238400 is an abundant number, since it is smaller than the sum of its proper divisors (238490209584).

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

78499238400 is a wasteful number, since it uses less digits than its factorization.

78499238400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6934 (or 6904 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 78499238400 in words is "seventy-eight billion, four hundred ninety-nine million, two hundred thirty-eight thousand, four hundred".