77780364 has 48 divisors (see below), whose sum is σ = 192439296. Its totient is φ = 24408000.

The previous prime is 77780359. The next prime is 77780371. The reversal of 77780364 is 46308777.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10939 + ... + 16589.

It is an arithmetic number, because the mean of its divisors is an integer number (4009152).

Almost surely, 2^77780364 is an apocalyptic number.

77780364 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

77780364 is an abundant number, since it is smaller than the sum of its proper divisors (114658932).

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

77780364 is a wasteful number, since it uses less digits than its factorization.

77780364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726 (or 5724 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 42.

The square root of 77780364 is about 8819.3176606810. The cubic root of 77780364 is about 426.8644528419.

The spelling of 77780364 in words is "seventy-seven million, seven hundred eighty thousand, three hundred sixty-four".