77218732 has 12 divisors (see below), whose sum is σ = 135206176. Its totient is φ = 38588400.

The previous prime is 77218727. The next prime is 77218733. The reversal of 77218732 is 23781277.

It is a junction number, because it is equal to n+sod(n) for n = 77218691 and 77218700.

It is not an unprimeable number, because it can be changed into a prime (77218733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5482 + ... + 13582.

Almost surely, 2^77218732 is an apocalyptic number.

It is an amenable number.

77218732 is a deficient number, since it is larger than the sum of its proper divisors (57987444).

77218732 is a wasteful number, since it uses less digits than its factorization.

77218732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10488 (or 10486 counting only the distinct ones).

The product of its digits is 32928, while the sum is 37.

The square root of 77218732 is about 8787.4189612195. The cubic root of 77218732 is about 425.8345438117.

The spelling of 77218732 in words is "seventy-seven million, two hundred eighteen thousand, seven hundred thirty-two".