77133344 has 12 divisors (see below), whose sum is σ = 151856334. Its totient is φ = 38566656.

The previous prime is 77133337. The next prime is 77133347. The reversal of 77133344 is 44333177.

It can be written as a sum of positive squares in only one way, i.e., 77088400 + 44944 = 8780^2 + 212^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 2410417 = 77133344 / (7 + 7 + 1 + 3 + 3 + 3 + 4 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 77133344.

It is not an unprimeable number, because it can be changed into a prime (77133347) by changing a digit.

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 as a sum of consecutive naturals, namely, 1205177 + ... + 1205240.

Almost surely, 2^77133344 is an apocalyptic number.

It is an amenable number.

77133344 is a deficient number, since it is larger than the sum of its proper divisors (74722990).

77133344 is a wasteful number, since it uses less digits than its factorization.

77133344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410427 (or 2410419 counting only the distinct ones).

The product of its digits is 21168, while the sum is 32.

The square root of 77133344 is about 8782.5590803592. The cubic root of 77133344 is about 425.6775241785.

It can be divided in two parts, 77133 and 344, that added together give a palindrome (77477).

The spelling of 77133344 in words is "seventy-seven million, one hundred thirty-three thousand, three hundred forty-four".