76720538 has 8 divisors (see below), whose sum is σ = 115118388. Its totient is φ = 38347744.

The previous prime is 76720531. The next prime is 76720577. The reversal of 76720538 is 83502767.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75986089 + 734449 = 8717^2 + 857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76720531) 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, 7070 + ... + 14262.

Almost surely, 2^76720538 is an apocalyptic number.

76720538 is a deficient number, since it is larger than the sum of its proper divisors (38397850).

76720538 is a wasteful number, since it uses less digits than its factorization.

76720538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12528.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 76720538 is about 8759.0260874141. The cubic root of 76720538 is about 424.9167781686.

The spelling of 76720538 in words is "seventy-six million, seven hundred twenty thousand, five hundred thirty-eight".