77670228 has 48 divisors (see below), whose sum is σ = 186701760. Its totient is φ = 25119744.

The previous prime is 77670223. The next prime is 77670251. The reversal of 77670228 is 82207677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77670223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61063 + ... + 62321.

It is an arithmetic number, because the mean of its divisors is an integer number (3889620).

Almost surely, 2^77670228 is an apocalyptic number.

It is an amenable number.

77670228 is an abundant number, since it is smaller than the sum of its proper divisors (109031532).

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

77670228 is a wasteful number, since it uses less digits than its factorization.

77670228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416 (or 1414 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 77670228 is about 8813.0714282820. The cubic root of 77670228 is about 426.6628794694.

The spelling of 77670228 in words is "seventy-seven million, six hundred seventy thousand, two hundred twenty-eight".