78945288 has 16 divisors (see below), whose sum is σ = 197363280. Its totient is φ = 26315088.

The previous prime is 78945287. The next prime is 78945311. The reversal of 78945288 is 88254987.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78945288.

It is not an unprimeable number, because it can be changed into a prime (78945287) 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, 1644670 + ... + 1644717.

It is an arithmetic number, because the mean of its divisors is an integer number (12335205).

Almost surely, 2^78945288 is an apocalyptic number.

It is an amenable number.

78945288 is an abundant number, since it is smaller than the sum of its proper divisors (118417992).

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

78945288 is a wasteful number, since it uses less digits than its factorization.

78945288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289396 (or 3289392 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 51.

The square root of 78945288 is about 8885.1160937829. The cubic root of 78945288 is about 428.9849647797.

The spelling of 78945288 in words is "seventy-eight million, nine hundred forty-five thousand, two hundred eighty-eight".