77137344 has 42 divisors (see below), whose sum is σ = 221101920. Its totient is φ = 25712256.

The previous prime is 77137343. The next prime is 77137351. The reversal of 77137344 is 44373177.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 77137299 and 77137308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77137343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66384 + ... + 67535.

Almost surely, 2^77137344 is an apocalyptic number.

It is an amenable number.

77137344 is an abundant number, since it is smaller than the sum of its proper divisors (143964576).

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

77137344 is a wasteful number, since it uses less digits than its factorization.

77137344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133937 (or 133924 counting only the distinct ones).

The product of its digits is 49392, while the sum is 36.

The square root of 77137344 is about 8782.7868014657. The cubic root of 77137344 is about 425.6848823481.

The spelling of 77137344 in words is "seventy-seven million, one hundred thirty-seven thousand, three hundred forty-four".