78823315 has 8 divisors (see below), whose sum is σ = 94837248. Its totient is φ = 62892480.

The previous prime is 78823313. The next prime is 78823319. The reversal of 78823315 is 51332887.

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

It is not a de Polignac number, because 78823315 - 2¹ = 78823313 is a prime.

It is a super-2 number, since 2×78823315² = 12426229975178450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78823313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18666 + ... + 22495.

It is an arithmetic number, because the mean of its divisors is an integer number (11854656).

Almost surely, 2^78823315 is an apocalyptic number.

78823315 is a deficient number, since it is larger than the sum of its proper divisors (16013933).

78823315 is a wasteful number, since it uses less digits than its factorization.

78823315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41549.

The product of its digits is 40320, while the sum is 37.

The square root of 78823315 is about 8878.2495459409. The cubic root of 78823315 is about 428.7639190601.

The spelling of 78823315 in words is "seventy-eight million, eight hundred twenty-three thousand, three hundred fifteen".