78559992 has 192 divisors, whose sum is σ = 263839680. Its totient is φ = 20606976.

The previous prime is 78559961. The next prime is 78559997. The reversal of 78559992 is 29995587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78559997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 454018 + ... + 454190.

It is an arithmetic number, because the mean of its divisors is an integer number (1374165).

Almost surely, 2^78559992 is an apocalyptic number.

78559992 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78559992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131919840).

78559992 is an abundant number, since it is smaller than the sum of its proper divisors (185279688).

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

78559992 is a wasteful number, since it uses less digits than its factorization.

78559992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 255 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The square root of 78559992 is about 8863.4074711704. The cubic root of 78559992 is about 428.2859329050.

The spelling of 78559992 in words is "seventy-eight million, five hundred fifty-nine thousand, nine hundred ninety-two".