439868879 has 4 divisors (see below), whose sum is σ = 441198120. Its totient is φ = 438539640.

The previous prime is 439868861. The next prime is 439868893. The reversal of 439868879 is 978868934.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439868879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439868899) 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, 664124 + ... + 664785.

It is an arithmetic number, because the mean of its divisors is an integer number (110299530).

Almost surely, 2^439868879 is an apocalyptic number.

439868879 is a deficient number, since it is larger than the sum of its proper divisors (1329241).

439868879 is a wasteful number, since it uses less digits than its factorization.

439868879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329240.

The product of its digits is 20901888, while the sum is 62.

The square root of 439868879 is about 20973.0512563146. The cubic root of 439868879 is about 760.5149320810.

The spelling of 439868879 in words is "four hundred thirty-nine million, eight hundred sixty-eight thousand, eight hundred seventy-nine".