77899386 has 16 divisors (see below), whose sum is σ = 157550400. Its totient is φ = 25674528.

The previous prime is 77899361. The next prime is 77899391. The reversal of 77899386 is 68399877.

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 7 ways as a sum of consecutive naturals, for example, 72406 + ... + 73473.

It is an arithmetic number, because the mean of its divisors is an integer number (9846900).

Almost surely, 2^77899386 is an apocalyptic number.

77899386 is an abundant number, since it is smaller than the sum of its proper divisors (79651014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77899386 is a wasteful number, since it uses less digits than its factorization.

77899386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145973.

The product of its digits is 4572288, while the sum is 57.

The square root of 77899386 is about 8826.0628821689. The cubic root of 77899386 is about 427.0820757533.

The spelling of 77899386 in words is "seventy-seven million, eight hundred ninety-nine thousand, three hundred eighty-six".