78307023 has 16 divisors (see below), whose sum is σ = 109817856. Its totient is φ = 49564320.

The previous prime is 78307013. The next prime is 78307039. The reversal of 78307023 is 32070387.

It is not a de Polignac number, because 78307023 - 2¹⁰ = 78305999 is a prime.

It is a super-2 number, since 2×78307023² = 12263979702245058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78307013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3015 + ... + 12872.

It is an arithmetic number, because the mean of its divisors is an integer number (6863616).

Almost surely, 2^78307023 is an apocalyptic number.

78307023 is a deficient number, since it is larger than the sum of its proper divisors (31510833).

78307023 is a wasteful number, since it uses less digits than its factorization.

78307023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15974.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 78307023 is about 8849.1255500191. The cubic root of 78307023 is about 427.8257344385.

The spelling of 78307023 in words is "seventy-eight million, three hundred seven thousand, twenty-three".