78855712 has 48 divisors (see below), whose sum is σ = 168581952. Its totient is φ = 36092160.

The previous prime is 78855703. The next prime is 78855731. The reversal of 78855712 is 21755887.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53773 + ... + 55219.

It is an arithmetic number, because the mean of its divisors is an integer number (3512124).

Almost surely, 2^78855712 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 78855712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84290976).

78855712 is an abundant number, since it is smaller than the sum of its proper divisors (89726240).

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

78855712 is a wasteful number, since it uses less digits than its factorization.

78855712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601 (or 1593 counting only the distinct ones).

The product of its digits is 156800, while the sum is 43.

The square root of 78855712 is about 8880.0738735666. The cubic root of 78855712 is about 428.8226527908.

The spelling of 78855712 in words is "seventy-eight million, eight hundred fifty-five thousand, seven hundred twelve".