77769344 has 16 divisors (see below), whose sum is σ = 154931370. Its totient is φ = 38884608.

The previous prime is 77769343. The next prime is 77769383. The reversal of 77769344 is 44396777.

It can be written as a sum of positive squares in only one way, i.e., 45050944 + 32718400 = 6712^2 + 5720^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (77769343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303659 + ... + 303914.

Almost surely, 2^77769344 is an apocalyptic number.

It is an amenable number.

77769344 is a deficient number, since it is larger than the sum of its proper divisors (77162026).

77769344 is an equidigital number, since it uses as much as digits as its factorization.

77769344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607587 (or 607575 counting only the distinct ones).

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

The square root of 77769344 is about 8818.6928736633. The cubic root of 77769344 is about 426.8442923618.

The spelling of 77769344 in words is "seventy-seven million, seven hundred sixty-nine thousand, three hundred forty-four".