449100891 has 24 divisors (see below), whose sum is σ = 692216720. Its totient is φ = 279749376.

The previous prime is 449100877. The next prime is 449100913. The reversal of 449100891 is 198001944.

It is not a de Polignac number, because 449100891 - 2¹⁰ = 449099867 is a prime.

It is a super-2 number, since 2×449100891² = 403383220593987762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449100811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5506 + ... + 30471.

Almost surely, 2^449100891 is an apocalyptic number.

449100891 is a deficient number, since it is larger than the sum of its proper divisors (243115829).

449100891 is a wasteful number, since it uses less digits than its factorization.

449100891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36075 (or 36072 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 449100891 is about 21192.0006370328. Note that the first 3 decimals coincide. The cubic root of 449100891 is about 765.7987249171.

The spelling of 449100891 in words is "four hundred forty-nine million, one hundred thousand, eight hundred ninety-one".