77868892 has 12 divisors (see below), whose sum is σ = 142195536. Its totient is φ = 37241600.

The previous prime is 77868887. The next prime is 77868911. The reversal of 77868892 is 29886877.

It is a congruent number.

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, 423109 + ... + 423292.

It is an arithmetic number, because the mean of its divisors is an integer number (11849628).

Almost surely, 2^77868892 is an apocalyptic number.

It is an amenable number.

77868892 is a deficient number, since it is larger than the sum of its proper divisors (64326644).

77868892 is a wasteful number, since it uses less digits than its factorization.

77868892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846428 (or 846426 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 55.

The square root of 77868892 is about 8824.3352157542. The cubic root of 77868892 is about 427.0263408658.

It can be divided in two parts, 778688 and 92, that multiplied together give a 4-th power (71639296 = 92⁴).

The spelling of 77868892 in words is "seventy-seven million, eight hundred sixty-eight thousand, eight hundred ninety-two".