77783080 has 16 divisors (see below), whose sum is σ = 175012020. Its totient is φ = 31113216.

The previous prime is 77783077. The next prime is 77783099. The reversal of 77783080 is 8038777.

It can be written as a sum of positive squares in 2 ways, for example, as 76003524 + 1779556 = 8718^2 + 1334^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1944577 = 77783080 / (7 + 7 + 7 + 8 + 3 + 0 + 8 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972249 + ... + 972328.

Almost surely, 2^77783080 is an apocalyptic number.

It is an amenable number.

77783080 is an abundant number, since it is smaller than the sum of its proper divisors (97228940).

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

77783080 is a wasteful number, since it uses less digits than its factorization.

77783080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944588 (or 1944584 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 77783080 is about 8819.4716395031. The cubic root of 77783080 is about 426.8694213211.

The spelling of 77783080 in words is "seventy-seven million, seven hundred eighty-three thousand, eighty".