449640724 has 36 divisors (see below), whose sum is σ = 875133084. Its totient is φ = 201906432.

The previous prime is 449640721. The next prime is 449640739. The reversal of 449640724 is 427046944.

It can be written as a sum of positive squares in 6 ways, for example, as 11492100 + 438148624 = 3390^2 + 20932^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449640721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16024 + ... + 34000.

Almost surely, 2^449640724 is an apocalyptic number.

It is an amenable number.

449640724 is a deficient number, since it is larger than the sum of its proper divisors (425492360).

449640724 is a wasteful number, since it uses less digits than its factorization.

449640724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18044 (or 18029 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 449640724 is about 21204.7335281536. The cubic root of 449640724 is about 766.1054398823.

The spelling of 449640724 in words is "four hundred forty-nine million, six hundred forty thousand, seven hundred twenty-four".