449181864 has 48 divisors (see below), whose sum is σ = 1222341120. Its totient is φ = 149012640.

The previous prime is 449181853. The next prime is 449181883. The reversal of 449181864 is 468181944.

449181864 is a `hidden beast` number, since 4 + 491 + 81 + 86 + 4 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409 + ... + 29975.

It is an arithmetic number, because the mean of its divisors is an integer number (25465440).

Almost surely, 2^449181864 is an apocalyptic number.

It is an amenable number.

449181864 is an abundant number, since it is smaller than the sum of its proper divisors (773159256).

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

449181864 is a wasteful number, since it uses less digits than its factorization.

449181864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29790 (or 29783 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 449181864 is about 21193.9110123639. The cubic root of 449181864 is about 765.8447467168.

The spelling of 449181864 in words is "four hundred forty-nine million, one hundred eighty-one thousand, eight hundred sixty-four".