77813272 has 16 divisors (see below), whose sum is σ = 146100240. Its totient is φ = 38853216.

The previous prime is 77813261. The next prime is 77813279. The reversal of 77813272 is 27231877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77813279) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 108 + ... + 12475.

It is an arithmetic number, because the mean of its divisors is an integer number (9131265).

Almost surely, 2^77813272 is an apocalyptic number.

It is an amenable number.

77813272 is a deficient number, since it is larger than the sum of its proper divisors (68286968).

77813272 is a wasteful number, since it uses less digits than its factorization.

77813272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13362 (or 13358 counting only the distinct ones).

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

The square root of 77813272 is about 8821.1831405997. The cubic root of 77813272 is about 426.9246448753.

The spelling of 77813272 in words is "seventy-seven million, eight hundred thirteen thousand, two hundred seventy-two".