77423812 has 12 divisors (see below), whose sum is σ = 137788560. Its totient is φ = 38055656.

The previous prime is 77423807. The next prime is 77423821. The reversal of 77423812 is 21832477.

It is a super-2 number, since 2×77423812² = 11988893329222688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163798 + ... + 164269.

It is an arithmetic number, because the mean of its divisors is an integer number (11482380).

Almost surely, 2^77423812 is an apocalyptic number.

It is an amenable number.

77423812 is a deficient number, since it is larger than the sum of its proper divisors (60364748).

77423812 is a wasteful number, since it uses less digits than its factorization.

77423812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328130 (or 328128 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 77423812 is about 8799.0801792006. The cubic root of 77423812 is about 426.2111922770.

The spelling of 77423812 in words is "seventy-seven million, four hundred twenty-three thousand, eight hundred twelve".