77326720 has 32 divisors (see below), whose sum is σ = 184860720. Its totient is φ = 30930432.

The previous prime is 77326687. The next prime is 77326721. The reversal of 77326720 is 2762377.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77326721) 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, 59772 + ... + 61051.

Almost surely, 2^77326720 is an apocalyptic number.

It is an amenable number.

77326720 is an abundant number, since it is smaller than the sum of its proper divisors (107534000).

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

77326720 is a wasteful number, since it uses less digits than its factorization.

77326720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120842 (or 120830 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 34.

The square root of 77326720 is about 8793.5612808463. The cubic root of 77326720 is about 426.0329568131.

The spelling of 77326720 in words is "seventy-seven million, three hundred twenty-six thousand, seven hundred twenty".