77388448 has 12 divisors (see below), whose sum is σ = 152358570. Its totient is φ = 38694208.

The previous prime is 77388419. The next prime is 77388449. The reversal of 77388448 is 84488377.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 76247824 + 1140624 = 8732^2 + 1068^2 .

It is not an unprimeable number, because it can be changed into a prime (77388449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1209163 + ... + 1209226.

Almost surely, 2^77388448 is an apocalyptic number.

It is an amenable number.

77388448 is a deficient number, since it is larger than the sum of its proper divisors (74970122).

77388448 is a wasteful number, since it uses less digits than its factorization.

77388448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418399 (or 2418391 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 49.

The square root of 77388448 is about 8797.0704214528. The cubic root of 77388448 is about 426.1462905040.

The spelling of 77388448 in words is "seventy-seven million, three hundred eighty-eight thousand, four hundred forty-eight".