77427344 has 20 divisors (see below), whose sum is σ = 152256624. Its totient is φ = 38135328.

The previous prime is 77427341. The next prime is 77427353. The reversal of 77427344 is 44372477.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77427298 and 77427307.

It is not an unprimeable number, because it can be changed into a prime (77427341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35042 + ... + 37185.

Almost surely, 2^77427344 is an apocalyptic number.

It is an amenable number.

77427344 is a deficient number, since it is larger than the sum of its proper divisors (74829280).

77427344 is a wasteful number, since it uses less digits than its factorization.

77427344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72302 (or 72296 counting only the distinct ones).

The product of its digits is 131712, while the sum is 38.

The square root of 77427344 is about 8799.2808797083. The cubic root of 77427344 is about 426.2176732937.

The spelling of 77427344 in words is "seventy-seven million, four hundred twenty-seven thousand, three hundred forty-four".