449313891 has 8 divisors (see below), whose sum is σ = 645168720. Its totient is φ = 276500832.

The previous prime is 449313869. The next prime is 449313899. The reversal of 449313891 is 198313944.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 449313891 - 2⁶ = 449313827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (449313899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5760396 + ... + 5760473.

It is an arithmetic number, because the mean of its divisors is an integer number (80646090).

Almost surely, 2^449313891 is an apocalyptic number.

449313891 is a deficient number, since it is larger than the sum of its proper divisors (195854829).

449313891 is a wasteful number, since it uses less digits than its factorization.

449313891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11520885.

The product of its digits is 93312, while the sum is 42.

The square root of 449313891 is about 21197.0255224642. The cubic root of 449313891 is about 765.9197736992.

The spelling of 449313891 in words is "four hundred forty-nine million, three hundred thirteen thousand, eight hundred ninety-one".