77157344 has 36 divisors (see below), whose sum is σ = 166976712. Its totient is φ = 35069760.

The previous prime is 77157343. The next prime is 77157349. The reversal of 77157344 is 44375177.

It is a junction number, because it is equal to n+sod(n) for n = 77157298 and 77157307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77157343) 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, 6092 + ... + 13835.

It is an arithmetic number, because the mean of its divisors is an integer number (4638242).

Almost surely, 2^77157344 is an apocalyptic number.

It is an amenable number.

77157344 is an abundant number, since it is smaller than the sum of its proper divisors (89819368).

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

77157344 is a wasteful number, since it uses less digits than its factorization.

77157344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19959 (or 19940 counting only the distinct ones).

The product of its digits is 82320, while the sum is 38.

The square root of 77157344 is about 8783.9253184439. The cubic root of 77157344 is about 425.7216693806.

The spelling of 77157344 in words is "seventy-seven million, one hundred fifty-seven thousand, three hundred forty-four".