78706992 has 160 divisors (see below), whose sum is σ = 257539072. Its totient is φ = 20155392.

The previous prime is 78706981. The next prime is 78706997. The reversal of 78706992 is 29960787.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (78706997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161373 + ... + 161859.

Almost surely, 2^78706992 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 78706992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128769536).

78706992 is an abundant number, since it is smaller than the sum of its proper divisors (178832080).

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

78706992 is a wasteful number, since it uses less digits than its factorization.

78706992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 78706992 is about 8871.6961174287. The cubic root of 78706992 is about 428.5529000244.

The spelling of 78706992 in words is "seventy-eight million, seven hundred six thousand, nine hundred ninety-two".