78992823 has 64 divisors (see below), whose sum is σ = 138736640. Its totient is φ = 38817792.

The previous prime is 78992801. The next prime is 78992827. The reversal of 78992823 is 32829987.

It is a happy number.

It is not a de Polignac number, because 78992823 - 2⁵ = 78992791 is a prime.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78992827) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 503061 + ... + 503217.

It is an arithmetic number, because the mean of its divisors is an integer number (2167760).

Almost surely, 2^78992823 is an apocalyptic number.

78992823 is a deficient number, since it is larger than the sum of its proper divisors (59743817).

78992823 is a wasteful number, since it uses less digits than its factorization.

78992823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296.

The product of its digits is 435456, while the sum is 48.

The square root of 78992823 is about 8887.7906703522. The cubic root of 78992823 is about 429.0710484856.

The spelling of 78992823 in words is "seventy-eight million, nine hundred ninety-two thousand, eight hundred twenty-three".