77197344 has 72 divisors (see below), whose sum is σ = 235741968. Its totient is φ = 22055040.

The previous prime is 77197343. The next prime is 77197411. The reversal of 77197344 is 44379177.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 77197296 and 77197305.

It is not an unprimeable number, because it can be changed into a prime (77197343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3502 + ... + 12909.

It is an arithmetic number, because the mean of its divisors is an integer number (3274194).

Almost surely, 2^77197344 is an apocalyptic number.

It is an amenable number.

77197344 is an abundant number, since it is smaller than the sum of its proper divisors (158544624).

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

77197344 is a wasteful number, since it uses less digits than its factorization.

77197344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16438 (or 16423 counting only the distinct ones).

The product of its digits is 148176, while the sum is 42.

The square root of 77197344 is about 8786.2019098129. The cubic root of 77197344 is about 425.7952243789.

The spelling of 77197344 in words is "seventy-seven million, one hundred ninety-seven thousand, three hundred forty-four".