77648268 has 12 divisors (see below), whose sum is σ = 181179320. Its totient is φ = 25882752.

The previous prime is 77648267. The next prime is 77648279. The reversal of 77648268 is 86284677.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (77648261) 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, 3235333 + ... + 3235356.

Almost surely, 2^77648268 is an apocalyptic number.

It is an amenable number.

77648268 is an abundant number, since it is smaller than the sum of its proper divisors (103531052).

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

77648268 is a wasteful number, since it uses less digits than its factorization.

77648268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6470696 (or 6470694 counting only the distinct ones).

The product of its digits is 903168, while the sum is 48.

The square root of 77648268 is about 8811.8254635461. The cubic root of 77648268 is about 426.6226650044.

The spelling of 77648268 in words is "seventy-seven million, six hundred forty-eight thousand, two hundred sixty-eight".