77614728 has 32 divisors (see below), whose sum is σ = 195760800. Its totient is φ = 25641728.

The previous prime is 77614721. The next prime is 77614739. The reversal of 77614728 is 82741677.

It is a self number, because there is not a number n which added to its sum of digits gives 77614728.

It is not an unprimeable number, because it can be changed into a prime (77614721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11598 + ... + 17021.

It is an arithmetic number, because the mean of its divisors is an integer number (6117525).

Almost surely, 2^77614728 is an apocalyptic number.

It is an amenable number.

77614728 is an abundant number, since it is smaller than the sum of its proper divisors (118146072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77614728 is a wasteful number, since it uses less digits than its factorization.

77614728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28741 (or 28737 counting only the distinct ones).

The product of its digits is 131712, while the sum is 42.

The square root of 77614728 is about 8809.9221335946. The cubic root of 77614728 is about 426.5612299148.

The spelling of 77614728 in words is "seventy-seven million, six hundred fourteen thousand, seven hundred twenty-eight".