78839330 has 8 divisors (see below), whose sum is σ = 141910812. Its totient is φ = 31535728.

The previous prime is 78839329. The next prime is 78839333. The reversal of 78839330 is 3393887.

It can be written as a sum of positive squares in 2 ways, for example, as 74425129 + 4414201 = 8627^2 + 2101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (78839333) 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, 3941957 + ... + 3941976.

Almost surely, 2^78839330 is an apocalyptic number.

78839330 is a deficient number, since it is larger than the sum of its proper divisors (63071482).

78839330 is a wasteful number, since it uses less digits than its factorization.

78839330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7883940.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 78839330 is about 8879.1514234188. The cubic root of 78839330 is about 428.7929552625.

The spelling of 78839330 in words is "seventy-eight million, eight hundred thirty-nine thousand, three hundred thirty".