439972491 has 16 divisors (see below), whose sum is σ = 692062208. Its totient is φ = 243302400.

The previous prime is 439972487. The next prime is 439972537. The reversal of 439972491 is 194279934.

It is a happy number.

It is not a de Polignac number, because 439972491 - 2² = 439972487 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 439972491.

It is not an unprimeable number, because it can be changed into a prime (439972441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337270 + ... + 338571.

It is an arithmetic number, because the mean of its divisors is an integer number (43253888).

Almost surely, 2^439972491 is an apocalyptic number.

439972491 is a deficient number, since it is larger than the sum of its proper divisors (252089717).

439972491 is a wasteful number, since it uses less digits than its factorization.

439972491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675882.

The product of its digits is 489888, while the sum is 48.

The square root of 439972491 is about 20975.5212330945. The cubic root of 439972491 is about 760.5746410008.

The spelling of 439972491 in words is "four hundred thirty-nine million, nine hundred seventy-two thousand, four hundred ninety-one".