77228012 has 6 divisors (see below), whose sum is σ = 135149028. Its totient is φ = 38614004.

The previous prime is 77228009. The next prime is 77228023. The reversal of 77228012 is 21082277.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9653498 + ... + 9653505.

It is an arithmetic number, because the mean of its divisors is an integer number (22524838).

Almost surely, 2^77228012 is an apocalyptic number.

It is an amenable number.

77228012 is a deficient number, since it is larger than the sum of its proper divisors (57921016).

77228012 is a wasteful number, since it uses less digits than its factorization.

77228012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19307007 (or 19307005 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 77228012 is about 8787.9469729852. The cubic root of 77228012 is about 425.8516017896.

The spelling of 77228012 in words is "seventy-seven million, two hundred twenty-eight thousand, twelve".