78448764 has 12 divisors (see below), whose sum is σ = 183047144. Its totient is φ = 26149584.

The previous prime is 78448763. The next prime is 78448771. The reversal of 78448764 is 46784487.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78448763) 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, 3268687 + ... + 3268710.

Almost surely, 2^78448764 is an apocalyptic number.

It is an amenable number.

78448764 is an abundant number, since it is smaller than the sum of its proper divisors (104598380).

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

78448764 is a wasteful number, since it uses less digits than its factorization.

78448764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6537404 (or 6537402 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 48.

The square root of 78448764 is about 8857.1306866276. The cubic root of 78448764 is about 428.0837100073.

The spelling of 78448764 in words is "seventy-eight million, four hundred forty-eight thousand, seven hundred sixty-four".