449920731 has 16 divisors (see below), whose sum is σ = 648734240. Its totient is φ = 275719680.

The previous prime is 449920697. The next prime is 449920747. The reversal of 449920731 is 137029944.

It is not a de Polignac number, because 449920731 - 2¹⁹ = 449396443 is a prime.

It is a super-2 number, since 2×449920731² = 404857328367148722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 449920731.

It is not an unprimeable number, because it can be changed into a prime (449920781) 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, 14536 + ... + 33333.

It is an arithmetic number, because the mean of its divisors is an integer number (40545890).

Almost surely, 2^449920731 is an apocalyptic number.

449920731 is a deficient number, since it is larger than the sum of its proper divisors (198813509).

449920731 is a wasteful number, since it uses less digits than its factorization.

449920731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48126.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 449920731 is about 21211.3349650605. The cubic root of 449920731 is about 766.2644337643.

The spelling of 449920731 in words is "four hundred forty-nine million, nine hundred twenty thousand, seven hundred thirty-one".