77085228 has 36 divisors (see below), whose sum is σ = 197707160. Its totient is φ = 23358720.

The previous prime is 77085227. The next prime is 77085233. The reversal of 77085228 is 82258077.

It is not an unprimeable number, because it can be changed into a prime (77085227) 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 11 ways as a sum of consecutive naturals, for example, 25093 + ... + 27996.

Almost surely, 2^77085228 is an apocalyptic number.

It is an amenable number.

77085228 is an abundant number, since it is smaller than the sum of its proper divisors (120621932).

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

77085228 is a wasteful number, since it uses less digits than its factorization.

77085228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53118 (or 53105 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 77085228 is about 8779.8193603285. The cubic root of 77085228 is about 425.5889928160.

The spelling of 77085228 in words is "seventy-seven million, eighty-five thousand, two hundred twenty-eight".