339839978 has 4 divisors (see below), whose sum is σ = 509759970. Its totient is φ = 169919988.

The previous prime is 339839977. The next prime is 339839987. The reversal of 339839978 is 879938933.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 267878689 + 71961289 = 16367^2 + 8483^2 .

It is not an unprimeable number, because it can be changed into a prime (339839977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84959993 + ... + 84959996.

Almost surely, 2^339839978 is an apocalyptic number.

339839978 is a deficient number, since it is larger than the sum of its proper divisors (169919992).

339839978 is a wasteful number, since it uses less digits than its factorization.

339839978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169919991.

The product of its digits is 8817984, while the sum is 59.

The square root of 339839978 is about 18434.7491981855. The cubic root of 339839978 is about 697.8436895984.

The spelling of 339839978 in words is "three hundred thirty-nine million, eight hundred thirty-nine thousand, nine hundred seventy-eight".