77723842 has 16 divisors (see below), whose sum is σ = 135119232. Its totient is φ = 32840640.

The previous prime is 77723803. The next prime is 77723879. The reversal of 77723842 is 24832777.

It is a junction number, because it is equal to n+sod(n) for n = 77723795 and 77723804.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38103 + ... + 40090.

It is an arithmetic number, because the mean of its divisors is an integer number (8444952).

Almost surely, 2^77723842 is an apocalyptic number.

77723842 is a deficient number, since it is larger than the sum of its proper divisors (57395390).

77723842 is a wasteful number, since it uses less digits than its factorization.

77723842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78273.

The product of its digits is 131712, while the sum is 40.

The square root of 77723842 is about 8816.1126353966. The cubic root of 77723842 is about 426.7610287983.

The spelling of 77723842 in words is "seventy-seven million, seven hundred twenty-three thousand, eight hundred forty-two".