439130657 has 8 divisors (see below), whose sum is σ = 502200000. Its totient is φ = 376145424.

The previous prime is 439130647. The next prime is 439130677. The reversal of 439130657 is 756031934.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439130657 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 439130657.

It is not an unprimeable number, because it can be changed into a prime (439130617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9407 + ... + 31092.

It is an arithmetic number, because the mean of its divisors is an integer number (62775000).

Almost surely, 2^439130657 is an apocalyptic number.

It is an amenable number.

439130657 is a deficient number, since it is larger than the sum of its proper divisors (63069343).

439130657 is a wasteful number, since it uses less digits than its factorization.

439130657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42055.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 439130657 is about 20955.4445669854. Note that the first 3 decimals coincide. The cubic root of 439130657 is about 760.0892421751.

The spelling of 439130657 in words is "four hundred thirty-nine million, one hundred thirty thousand, six hundred fifty-seven".