78989330 has 64 divisors (see below), whose sum is σ = 169827840. Its totient is φ = 25880064.

The previous prime is 78989297. The next prime is 78989353. The reversal of 78989330 is 3398987.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 338894 + ... + 339126.

It is an arithmetic number, because the mean of its divisors is an integer number (2653560).

Almost surely, 2^78989330 is an apocalyptic number.

78989330 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78989330 is an abundant number, since it is smaller than the sum of its proper divisors (90838510).

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

78989330 is a wasteful number, since it uses less digits than its factorization.

78989330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 78989330 is about 8887.5941626517. The cubic root of 78989330 is about 429.0647239985.

The spelling of 78989330 in words is "seventy-eight million, nine hundred eighty-nine thousand, three hundred thirty".