78385923 has 24 divisors (see below), whose sum is σ = 141163776. Its totient is φ = 40719600.

The previous prime is 78385921. The next prime is 78385939. The reversal of 78385923 is 32958387.

It is not a de Polignac number, because 78385923 - 2¹ = 78385921 is a prime.

It is a super-2 number, since 2×78385923² = 12288705849123858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78385921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55863 + ... + 57248.

It is an arithmetic number, because the mean of its divisors is an integer number (5881824).

Almost surely, 2^78385923 is an apocalyptic number.

78385923 is a deficient number, since it is larger than the sum of its proper divisors (62777853).

78385923 is a wasteful number, since it uses less digits than its factorization.

78385923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113135 (or 113132 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 78385923 is about 8853.5824952389. The cubic root of 78385923 is about 427.9693746829.

The spelling of 78385923 in words is "seventy-eight million, three hundred eighty-five thousand, nine hundred twenty-three".