77085812 has 12 divisors (see below), whose sum is σ = 142000320. Its totient is φ = 36514296.

The previous prime is 77085773. The next prime is 77085817. The reversal of 77085812 is 21858077.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77085817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507068 + ... + 507219.

It is an arithmetic number, because the mean of its divisors is an integer number (11833360).

Almost surely, 2^77085812 is an apocalyptic number.

It is an amenable number.

77085812 is a deficient number, since it is larger than the sum of its proper divisors (64914508).

77085812 is a wasteful number, since it uses less digits than its factorization.

77085812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014310 (or 1014308 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 77085812 is about 8779.8526183530. The cubic root of 77085812 is about 425.5900675716.

The spelling of 77085812 in words is "seventy-seven million, eighty-five thousand, eight hundred twelve".