77231908 has 24 divisors (see below), whose sum is σ = 146263040. Its totient is φ = 35471520.

The previous prime is 77231897. The next prime is 77231909. The reversal of 77231908 is 80913277.

It is a super-2 number, since 2×77231908² = 11929535226640928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77231909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7453 + ... + 14491.

Almost surely, 2^77231908 is an apocalyptic number.

It is an amenable number.

77231908 is a deficient number, since it is larger than the sum of its proper divisors (69031132).

77231908 is a wasteful number, since it uses less digits than its factorization.

77231908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7267 (or 7265 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 77231908 is about 8788.1686374352. The cubic root of 77231908 is about 425.8587627920.

The spelling of 77231908 in words is "seventy-seven million, two hundred thirty-one thousand, nine hundred eight".