775720980 has 72 divisors (see below), whose sum is σ = 2476874400. Its totient is φ = 195970752.

The previous prime is 775720963. The next prime is 775720991. The reversal of 775720980 is 89027577.

775720980 is a `hidden beast` number, since 77 + 572 + 0 + 9 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109990 + ... + 116829.

Almost surely, 2^775720980 is an apocalyptic number.

It is an amenable number.

775720980 is an abundant number, since it is smaller than the sum of its proper divisors (1701153420).

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

775720980 is a wasteful number, since it uses less digits than its factorization.

775720980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226853 (or 226848 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 775720980 is about 27851.7679869699. The cubic root of 775720980 is about 918.8300266263.

The spelling of 775720980 in words is "seven hundred seventy-five million, seven hundred twenty thousand, nine hundred eighty".