439820057 has 4 divisors (see below), whose sum is σ = 440010276. Its totient is φ = 439629840.

The previous prime is 439820041. The next prime is 439820063. The reversal of 439820057 is 750028934.

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

It can be written as a sum of positive squares in 2 ways, for example, as 366186496 + 73633561 = 19136^2 + 8581^2 .

It is a cyclic number.

It is not a de Polignac number, because 439820057 - 2⁴ = 439820041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 439820057.

It is not an unprimeable number, because it can be changed into a prime (439820027) 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, 91598 + ... + 96279.

It is an arithmetic number, because the mean of its divisors is an integer number (110002569).

Almost surely, 2^439820057 is an apocalyptic number.

It is an amenable number.

439820057 is a deficient number, since it is larger than the sum of its proper divisors (190219).

439820057 is a wasteful number, since it uses less digits than its factorization.

439820057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190218.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 439820057 is about 20971.8873018143. The cubic root of 439820057 is about 760.4867939732.

The spelling of 439820057 in words is "four hundred thirty-nine million, eight hundred twenty thousand, fifty-seven".