78336423 has 16 divisors (see below), whose sum is σ = 126604800. Its totient is φ = 47476440.

The previous prime is 78336421. The next prime is 78336439. The reversal of 78336423 is 32463387.

78336423 is a `hidden beast` number, since 7 + 8 + 3 + 3 + 642 + 3 = 666.

It is not a de Polignac number, because 78336423 - 2¹ = 78336421 is a prime.

It is a super-2 number, since 2×78336423² = 12273190336869858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78336421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131583 + ... + 132176.

It is an arithmetic number, because the mean of its divisors is an integer number (7912800).

Almost surely, 2^78336423 is an apocalyptic number.

78336423 is a deficient number, since it is larger than the sum of its proper divisors (48268377).

78336423 is a wasteful number, since it uses less digits than its factorization.

78336423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263779 (or 263773 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 78336423 is about 8850.7865752147. The cubic root of 78336423 is about 427.8792694528.

It can be divided in two parts, 783364 and 23, that added together give a palindrome (783387).

The spelling of 78336423 in words is "seventy-eight million, three hundred thirty-six thousand, four hundred twenty-three".