77338918 has 4 divisors (see below), whose sum is σ = 116008380. Its totient is φ = 38669458.

The previous prime is 77338913. The next prime is 77338927. The reversal of 77338918 is 81983377.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77338913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19334728 + ... + 19334731.

It is an arithmetic number, because the mean of its divisors is an integer number (29002095).

Almost surely, 2^77338918 is an apocalyptic number.

77338918 is a deficient number, since it is larger than the sum of its proper divisors (38669462).

77338918 is a wasteful number, since it uses less digits than its factorization.

77338918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38669461.

The product of its digits is 254016, while the sum is 46.

The square root of 77338918 is about 8794.2548291484. The cubic root of 77338918 is about 426.0553573356.

The spelling of 77338918 in words is "seventy-seven million, three hundred thirty-eight thousand, nine hundred eighteen".