77205812 has 12 divisors (see below), whose sum is σ = 138252576. Its totient is φ = 37705080.

The previous prime is 77205811. The next prime is 77205833. The reversal of 77205812 is 21850277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77205811) 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, 224264 + ... + 224607.

It is an arithmetic number, because the mean of its divisors is an integer number (11521048).

Almost surely, 2^77205812 is an apocalyptic number.

It is an amenable number.

77205812 is a deficient number, since it is larger than the sum of its proper divisors (61046764).

77205812 is a wasteful number, since it uses less digits than its factorization.

77205812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448918 (or 448916 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 77205812 is about 8786.6837885519. The cubic root of 77205812 is about 425.8107927130.

The spelling of 77205812 in words is "seventy-seven million, two hundred five thousand, eight hundred twelve".