77927072 has 12 divisors (see below), whose sum is σ = 153418986. Its totient is φ = 38963520.

The previous prime is 77927071. The next prime is 77927117. The reversal of 77927072 is 27072977.

It can be written as a sum of positive squares in only one way, i.e., 57820816 + 20106256 = 7604^2 + 4484^2 .

It is not an unprimeable number, because it can be changed into a prime (77927071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1217579 + ... + 1217642.

Almost surely, 2^77927072 is an apocalyptic number.

It is an amenable number.

77927072 is a deficient number, since it is larger than the sum of its proper divisors (75491914).

77927072 is a wasteful number, since it uses less digits than its factorization.

77927072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435231 (or 2435223 counting only the distinct ones).

The product of its (nonzero) digits is 86436, while the sum is 41.

The square root of 77927072 is about 8827.6311658338. The cubic root of 77927072 is about 427.1326657705.

The spelling of 77927072 in words is "seventy-seven million, nine hundred twenty-seven thousand, seventy-two".