78646023 has 6 divisors (see below), whose sum is σ = 113599824. Its totient is φ = 52430676.

The previous prime is 78646021. The next prime is 78646049. The reversal of 78646023 is 32064687.

78646023 is a `hidden beast` number, since 7 + 8 + 646 + 0 + 2 + 3 = 666.

It is not a de Polignac number, because 78646023 - 2¹ = 78646021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78646021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4369215 + ... + 4369232.

It is an arithmetic number, because the mean of its divisors is an integer number (18933304).

Almost surely, 2^78646023 is an apocalyptic number.

78646023 is a deficient number, since it is larger than the sum of its proper divisors (34953801).

78646023 is a wasteful number, since it uses less digits than its factorization.

78646023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8738453 (or 8738450 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 78646023 is about 8868.2592993214. The cubic root of 78646023 is about 428.4422144268.

The spelling of 78646023 in words is "seventy-eight million, six hundred forty-six thousand, twenty-three".