77813882 has 8 divisors (see below), whose sum is σ = 116778996. Its totient is φ = 38887552.

The previous prime is 77813881. The next prime is 77813887. The reversal of 77813882 is 28831877.

It can be written as a sum of positive squares in 2 ways, for example, as 76020961 + 1792921 = 8719^2 + 1339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (77813881) by changing a digit.

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, 4013 + ... + 13104.

Almost surely, 2^77813882 is an apocalyptic number.

77813882 is a deficient number, since it is larger than the sum of its proper divisors (38965114).

77813882 is a wasteful number, since it uses less digits than its factorization.

77813882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19392.

The product of its digits is 150528, while the sum is 44.

The square root of 77813882 is about 8821.2177163927. The cubic root of 77813882 is about 426.9257604663.

The spelling of 77813882 in words is "seventy-seven million, eight hundred thirteen thousand, eight hundred eighty-two".