775412872 has 16 divisors (see below), whose sum is σ = 1565737740. Its totient is φ = 357882816.

The previous prime is 775412849. The next prime is 775412873. The reversal of 775412872 is 278214577.

It can be written as a sum of positive squares in 2 ways, for example, as 621305476 + 154107396 = 24926^2 + 12414^2 .

It is not an unprimeable number, because it can be changed into a prime (775412873) 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, 3727843 + ... + 3728050.

Almost surely, 2^775412872 is an apocalyptic number.

It is an amenable number.

775412872 is an abundant number, since it is smaller than the sum of its proper divisors (790324868).

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

775412872 is a wasteful number, since it uses less digits than its factorization.

775412872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7455912 (or 7455908 counting only the distinct ones).

The product of its digits is 219520, while the sum is 43.

The square root of 775412872 is about 27846.2362268225. The cubic root of 775412872 is about 918.7083607272.

The spelling of 775412872 in words is "seven hundred seventy-five million, four hundred twelve thousand, eight hundred seventy-two".