771040880 has 20 divisors (see below), whose sum is σ = 1792670232. Its totient is φ = 308416320.

The previous prime is 771040849. The next prime is 771040883. The reversal of 771040880 is 88040177.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 771040880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771040883) 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, 4818926 + ... + 4819085.

Almost surely, 2^771040880 is an apocalyptic number.

It is an amenable number.

771040880 is an abundant number, since it is smaller than the sum of its proper divisors (1021629352).

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

771040880 is a wasteful number, since it uses less digits than its factorization.

771040880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9638024 (or 9638018 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 771040880 is about 27767.6228726911. The cubic root of 771040880 is about 916.9784615741.

The spelling of 771040880 in words is "seven hundred seventy-one million, forty thousand, eight hundred eighty".