77109008 has 20 divisors (see below), whose sum is σ = 158187420. Its totient is φ = 36286464.

The previous prime is 77108981. The next prime is 77109013. The reversal of 77109008 is 80090177.

It can be written as a sum of positive squares in 2 ways, for example, as 52823824 + 24285184 = 7268^2 + 4928^2 .

It is a super-2 number, since 2×77109008² = 11891598229488128, 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, 141473 + ... + 142016.

It is an arithmetic number, because the mean of its divisors is an integer number (7909371).

Almost surely, 2^77109008 is an apocalyptic number.

It is an amenable number.

77109008 is an abundant number, since it is smaller than the sum of its proper divisors (81078412).

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

77109008 is a wasteful number, since it uses less digits than its factorization.

77109008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283514 (or 283508 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 77109008 is about 8781.1734978874. The cubic root of 77109008 is about 425.6327515923.

The spelling of 77109008 in words is "seventy-seven million, one hundred nine thousand, eight".