77729712 has 40 divisors (see below), whose sum is σ = 212615856. Its totient is φ = 24385536.

The previous prime is 77729693. The next prime is 77729737. The reversal of 77729712 is 21792777.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 46813 + ... + 48444.

Almost surely, 2^77729712 is an apocalyptic number.

It is an amenable number.

77729712 is an abundant number, since it is smaller than the sum of its proper divisors (134886144).

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

77729712 is a wasteful number, since it uses less digits than its factorization.

77729712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95285 (or 95279 counting only the distinct ones).

The product of its digits is 86436, while the sum is 42.

The square root of 77729712 is about 8816.4455422806. The cubic root of 77729712 is about 426.7717720662.

The spelling of 77729712 in words is "seventy-seven million, seven hundred twenty-nine thousand, seven hundred twelve".