775128488 has 16 divisors (see below), whose sum is σ = 1454847360. Its totient is φ = 387169200.

The previous prime is 775128469. The next prime is 775128491. The reversal of 775128488 is 884821577.

It is a super-2 number, since 2×775128488² = 1201648345818332288, which contains 22 as substring.

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, 40958 + ... + 56813.

It is an arithmetic number, because the mean of its divisors is an integer number (90927960).

Almost surely, 2^775128488 is an apocalyptic number.

It is an amenable number.

775128488 is a deficient number, since it is larger than the sum of its proper divisors (679718872).

775128488 is a wasteful number, since it uses less digits than its factorization.

775128488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98768 (or 98764 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 50.

The square root of 775128488 is about 27841.1294311132. The cubic root of 775128488 is about 918.5960343721.

The spelling of 775128488 in words is "seven hundred seventy-five million, one hundred twenty-eight thousand, four hundred eighty-eight".