78711312 has 40 divisors (see below), whose sum is σ = 204495840. Its totient is φ = 26087680.

The previous prime is 78711293. The next prime is 78711331. The reversal of 78711312 is 21311787.

It is an interprime number because it is at equal distance from previous prime (78711293) and next prime (78711331).

It is a super-2 number, since 2×78711312² = 12390941273522688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78711312.

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, 4012 + ... + 13172.

It is an arithmetic number, because the mean of its divisors is an integer number (5112396).

Almost surely, 2^78711312 is an apocalyptic number.

It is an amenable number.

78711312 is an abundant number, since it is smaller than the sum of its proper divisors (125784528).

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

78711312 is a wasteful number, since it uses less digits than its factorization.

78711312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9351 (or 9345 counting only the distinct ones).

The product of its digits is 2352, while the sum is 30.

The square root of 78711312 is about 8871.9395850062. The cubic root of 78711312 is about 428.5607405589.

The spelling of 78711312 in words is "seventy-eight million, seven hundred eleven thousand, three hundred twelve".