77087808 has 112 divisors (see below), whose sum is σ = 259039360. Its totient is φ = 22021632.

The previous prime is 77087783. The next prime is 77087819. The reversal of 77087808 is 80878077.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8910 + ... + 15282.

Almost surely, 2^77087808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77087808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129519680).

77087808 is an abundant number, since it is smaller than the sum of its proper divisors (181951552).

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

77087808 is a wasteful number, since it uses less digits than its factorization.

77087808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401 (or 6385 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The square root of 77087808 is about 8779.9662869512. The cubic root of 77087808 is about 425.5937408392.

The spelling of 77087808 in words is "seventy-seven million, eighty-seven thousand, eight hundred eight".