449650890 has 48 divisors (see below), whose sum is σ = 1259025768. Its totient is φ = 110683008.

The previous prime is 449650849. The next prime is 449650913. The reversal of 449650890 is 98056944.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 404854641 + 44796249 = 20121^2 + 6693^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190989 + ... + 193328.

Almost surely, 2^449650890 is an apocalyptic number.

449650890 is an abundant number, since it is smaller than the sum of its proper divisors (809374878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

449650890 is a wasteful number, since it uses less digits than its factorization.

449650890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384343 (or 384340 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 449650890 is about 21204.9732374271. The cubic root of 449650890 is about 766.1112135061. Note that the first 3 decimals are identical.

The spelling of 449650890 in words is "four hundred forty-nine million, six hundred fifty thousand, eight hundred ninety".