77680272 has 40 divisors (see below), whose sum is σ = 201817440. Its totient is φ = 25745920.

The previous prime is 77680271. The next prime is 77680297. The reversal of 77680272 is 27208677.

It is a self number, because there is not a number n which added to its sum of digits gives 77680272.

It is not an unprimeable number, because it can be changed into a prime (77680271) 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, 4072 + ... + 13112.

It is an arithmetic number, because the mean of its divisors is an integer number (5045436).

Almost surely, 2^77680272 is an apocalyptic number.

It is an amenable number.

77680272 is an abundant number, since it is smaller than the sum of its proper divisors (124137168).

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

77680272 is a wasteful number, since it uses less digits than its factorization.

77680272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9231 (or 9225 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 77680272 is about 8813.6412452516. The cubic root of 77680272 is about 426.6812701165.

The spelling of 77680272 in words is "seventy-seven million, six hundred eighty thousand, two hundred seventy-two".