78992712 has 128 divisors (see below), whose sum is σ = 232243200. Its totient is φ = 24840000.

The previous prime is 78992707. The next prime is 78992717. The reversal of 78992712 is 21729987.

It is an interprime number because it is at equal distance from previous prime (78992707) and next prime (78992717).

It is a super-2 number, since 2×78992712² = 12479697098229888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78992717) 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, 314587 + ... + 314837.

It is an arithmetic number, because the mean of its divisors is an integer number (1814400).

Almost surely, 2^78992712 is an apocalyptic number.

78992712 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 78992712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116121600).

78992712 is an abundant number, since it is smaller than the sum of its proper divisors (153250488).

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

78992712 is a wasteful number, since it uses less digits than its factorization.

78992712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 334 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 78992712 is about 8887.7844258285. The cubic root of 78992712 is about 429.0708475099.

The spelling of 78992712 in words is "seventy-eight million, nine hundred ninety-two thousand, seven hundred twelve".