78889364 has 6 divisors (see below), whose sum is σ = 138056394. Its totient is φ = 39444680.

The previous prime is 78889339. The next prime is 78889381. The reversal of 78889364 is 46398887.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 77088400 + 1800964 = 8780^2 + 1342^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9861167 + ... + 9861174.

It is an arithmetic number, because the mean of its divisors is an integer number (23009399).

Almost surely, 2^78889364 is an apocalyptic number.

It is an amenable number.

78889364 is a deficient number, since it is larger than the sum of its proper divisors (59167030).

78889364 is a wasteful number, since it uses less digits than its factorization.

78889364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19722345 (or 19722343 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 53.

The square root of 78889364 is about 8881.9684755126. The cubic root of 78889364 is about 428.8836447267.

The spelling of 78889364 in words is "seventy-eight million, eight hundred eighty-nine thousand, three hundred sixty-four".