72577768 has 16 divisors (see below), whose sum is σ = 137948580. Its totient is φ = 35791488.

The previous prime is 72577763. The next prime is 72577781. The reversal of 72577768 is 86777527.

It can be written as a sum of positive squares in 2 ways, for example, as 72284004 + 293764 = 8502^2 + 542^2 .

It is not an unprimeable number, because it can be changed into a prime (72577763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61555 + ... + 62722.

Almost surely, 2^72577768 is an apocalyptic number.

It is an amenable number.

72577768 is a deficient number, since it is larger than the sum of its proper divisors (65370812).

72577768 is a wasteful number, since it uses less digits than its factorization.

72577768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124356 (or 124352 counting only the distinct ones).

The product of its digits is 1152480, while the sum is 49.

The square root of 72577768 is about 8519.2586531928. The cubic root of 72577768 is about 417.1265844924.

The spelling of 72577768 in words is "seventy-two million, five hundred seventy-seven thousand, seven hundred sixty-eight".