78319846 has 16 divisors (see below), whose sum is σ = 128424528. Its totient is φ = 35526400.

The previous prime is 78319823. The next prime is 78319847. The reversal of 78319846 is 64891387.

It is a happy number.

It is a super-2 number, since 2×78319846² = 12267996554927432, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78319796 and 78319805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78319847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8046 + ... + 14878.

It is an arithmetic number, because the mean of its divisors is an integer number (8026533).

Almost surely, 2^78319846 is an apocalyptic number.

78319846 is a deficient number, since it is larger than the sum of its proper divisors (50104682).

78319846 is a wasteful number, since it uses less digits than its factorization.

78319846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367.

The product of its digits is 290304, while the sum is 46.

The square root of 78319846 is about 8849.8500552269. The cubic root of 78319846 is about 427.8490857284.

The spelling of 78319846 in words is "seventy-eight million, three hundred nineteen thousand, eight hundred forty-six".