78812115 has 8 divisors (see below), whose sum is σ = 126099408. Its totient is φ = 42033120.

The previous prime is 78812047. The next prime is 78812131. The reversal of 78812115 is 51121887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78812115 - 2⁷ = 78811987 is a prime.

It is a super-2 number, since 2×78812115² = 12422698941546450, which contains 22 as substring.

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, 2627056 + ... + 2627085.

It is an arithmetic number, because the mean of its divisors is an integer number (15762426).

Almost surely, 2^78812115 is an apocalyptic number.

78812115 is a deficient number, since it is larger than the sum of its proper divisors (47287293).

78812115 is a wasteful number, since it uses less digits than its factorization.

78812115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5254149.

The product of its digits is 4480, while the sum is 33.

The square root of 78812115 is about 8877.6187685663. The cubic root of 78812115 is about 428.7436104185.

The spelling of 78812115 in words is "seventy-eight million, eight hundred twelve thousand, one hundred fifteen".