77055808 has 28 divisors (see below), whose sum is σ = 153220420. Its totient is φ = 38449152.

The previous prime is 77055779. The next prime is 77055809. The reversal of 77055808 is 80855077.

It can be written as a sum of positive squares in 2 ways, for example, as 52533504 + 24522304 = 7248^2 + 4952^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77055809) 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, 42178 + ... + 43966.

Almost surely, 2^77055808 is an apocalyptic number.

It is an amenable number.

77055808 is a deficient number, since it is larger than the sum of its proper divisors (76164612).

77055808 is a wasteful number, since it uses less digits than its factorization.

77055808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 2464 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 40.

The square root of 77055808 is about 8778.1437673349. The cubic root of 77055808 is about 425.5348431356.

The spelling of 77055808 in words is "seventy-seven million, fifty-five thousand, eight hundred eight".