77287312 has 20 divisors (see below), whose sum is σ = 149906700. Its totient is φ = 38601728.

The previous prime is 77287283. The next prime is 77287361. The reversal of 77287312 is 21378277.

It can be written as a sum of positive squares in 2 ways, for example, as 28901376 + 48385936 = 5376^2 + 6956^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17064 + ... + 21112.

It is an arithmetic number, because the mean of its divisors is an integer number (7495335).

Almost surely, 2^77287312 is an apocalyptic number.

It is an amenable number.

77287312 is a deficient number, since it is larger than the sum of its proper divisors (72619388).

77287312 is a wasteful number, since it uses less digits than its factorization.

77287312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250 (or 5244 counting only the distinct ones).

The product of its digits is 32928, while the sum is 37.

The square root of 77287312 is about 8791.3202648976. The cubic root of 77287312 is about 425.9605714865.

The spelling of 77287312 in words is "seventy-seven million, two hundred eighty-seven thousand, three hundred twelve".