78326397 has 12 divisors (see below), whose sum is σ = 113571744. Its totient is φ = 52017480.

The previous prime is 78326389. The next prime is 78326399. The reversal of 78326397 is 79362387.

It is a happy number.

78326397 is a `hidden beast` number, since 7 + 8 + 3 + 2 + 639 + 7 = 666.

It is not a de Polignac number, because 78326397 - 2³ = 78326389 is a prime.

It is a super-2 number, since 2×78326397² = 12270048934003218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78326399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14179 + ... + 18912.

It is an arithmetic number, because the mean of its divisors is an integer number (9464312).

Almost surely, 2^78326397 is an apocalyptic number.

It is an amenable number.

78326397 is a deficient number, since it is larger than the sum of its proper divisors (35245347).

78326397 is a wasteful number, since it uses less digits than its factorization.

78326397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33360 (or 33357 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 78326397 is about 8850.2201667529. The cubic root of 78326397 is about 427.8610144257.

The spelling of 78326397 in words is "seventy-eight million, three hundred twenty-six thousand, three hundred ninety-seven".