77908228 has 24 divisors (see below), whose sum is σ = 138774272. Its totient is φ = 38263104.

The previous prime is 77908223. The next prime is 77908253. The reversal of 77908228 is 82280977.

It is not an unprimeable number, because it can be changed into a prime (77908223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106801 + ... + 107527.

Almost surely, 2^77908228 is an apocalyptic number.

It is an amenable number.

77908228 is a deficient number, since it is larger than the sum of its proper divisors (60866044).

77908228 is a wasteful number, since it uses less digits than its factorization.

77908228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 77908228 is about 8826.5637708001. The cubic root of 77908228 is about 427.0982338475.

The spelling of 77908228 in words is "seventy-seven million, nine hundred eight thousand, two hundred twenty-eight".