77711320 has 32 divisors (see below), whose sum is σ = 178920720. Its totient is φ = 30360960.

The previous prime is 77711317. The next prime is 77711321. The reversal of 77711320 is 2311777.

It is a super-2 number, since 2×77711320² = 12078098512284800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77711321) 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 7 ways as a sum of consecutive naturals, for example, 20871 + ... + 24310.

Almost surely, 2^77711320 is an apocalyptic number.

It is an amenable number.

77711320 is an abundant number, since it is smaller than the sum of its proper divisors (101209400).

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

77711320 is a wasteful number, since it uses less digits than its factorization.

77711320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45235 (or 45231 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 77711320 is about 8815.4024298384. The cubic root of 77711320 is about 426.7381092390.

The spelling of 77711320 in words is "seventy-seven million, seven hundred eleven thousand, three hundred twenty".