77871344 has 20 divisors (see below), whose sum is σ = 152263320. Its totient is φ = 38577600.

The previous prime is 77871337. The next prime is 77871359. The reversal of 77871344 is 44317877.

It is a congruent number.

It is an unprimeable number.

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, 20582 + ... + 24069.

It is an arithmetic number, because the mean of its divisors is an integer number (7613166).

Almost surely, 2^77871344 is an apocalyptic number.

It is an amenable number.

77871344 is a deficient number, since it is larger than the sum of its proper divisors (74391976).

77871344 is a wasteful number, since it uses less digits than its factorization.

77871344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44768 (or 44762 counting only the distinct ones).

The product of its digits is 131712, while the sum is 41.

The square root of 77871344 is about 8824.4741486391. The cubic root of 77871344 is about 427.0308230048.

The spelling of 77871344 in words is "seventy-seven million, eight hundred seventy-one thousand, three hundred forty-four".