77911742 has 36 divisors (see below), whose sum is σ = 129515616. Its totient is φ = 35109720.

The previous prime is 77911699. The next prime is 77911781. The reversal of 77911742 is 24711977.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 77911696 and 77911705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1320509 + ... + 1320567.

It is an arithmetic number, because the mean of its divisors is an integer number (3597656).

Almost surely, 2^77911742 is an apocalyptic number.

77911742 is a deficient number, since it is larger than the sum of its proper divisors (51603874).

77911742 is a wasteful number, since it uses less digits than its factorization.

77911742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 111 counting only the distinct ones).

The product of its digits is 24696, while the sum is 38.

The square root of 77911742 is about 8826.7628267672. The cubic root of 77911742 is about 427.1046550804.

It can be divided in two parts, 779 and 11742, that added together give a palindrome (12521).

The spelling of 77911742 in words is "seventy-seven million, nine hundred eleven thousand, seven hundred forty-two".