77311908 has 42 divisors (see below), whose sum is σ = 202858614. Its totient is φ = 25769664.

The previous prime is 77311873. The next prime is 77311909. The reversal of 77311908 is 80911377.

77311908 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 54730404 + 22581504 = 7398^2 + 4752^2 .

It is a super-2 number, since 2×77311908² = 11954262237200928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77311909) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 10341 + ... + 16172.

It is an arithmetic number, because the mean of its divisors is an integer number (4829967).

Almost surely, 2^77311908 is an apocalyptic number.

It is an amenable number.

77311908 is an abundant number, since it is smaller than the sum of its proper divisors (125546706).

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

77311908 is a wasteful number, since it uses less digits than its factorization.

77311908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26535 (or 26518 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 77311908 is about 8792.7190333821. The cubic root of 77311908 is about 426.0057527491.

The spelling of 77311908 in words is "seventy-seven million, three hundred eleven thousand, nine hundred eight".