77379644 has 6 divisors (see below), whose sum is σ = 135414384. Its totient is φ = 38689820.

The previous prime is 77379637. The next prime is 77379649. The reversal of 77379644 is 44697377.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77379649) 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 as a sum of consecutive naturals, namely, 9672452 + ... + 9672459.

It is an arithmetic number, because the mean of its divisors is an integer number (22569064).

Almost surely, 2^77379644 is an apocalyptic number.

It is an amenable number.

77379644 is a deficient number, since it is larger than the sum of its proper divisors (58034740).

77379644 is a wasteful number, since it uses less digits than its factorization.

77379644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19344915 (or 19344913 counting only the distinct ones).

The product of its digits is 889056, while the sum is 47.

The square root of 77379644 is about 8796.5700133632. The cubic root of 77379644 is about 426.1301298912.

The spelling of 77379644 in words is "seventy-seven million, three hundred seventy-nine thousand, six hundred forty-four".