449971138 has 16 divisors (see below), whose sum is σ = 711558144. Its totient is φ = 213094080.

The previous prime is 449971127. The next prime is 449971153. The reversal of 449971138 is 831179944.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74295 + ... + 80122.

It is an arithmetic number, because the mean of its divisors is an integer number (44472384).

Almost surely, 2^449971138 is an apocalyptic number.

449971138 is a deficient number, since it is larger than the sum of its proper divisors (261587006).

449971138 is a wasteful number, since it uses less digits than its factorization.

449971138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154497.

The product of its digits is 217728, while the sum is 46.

The square root of 449971138 is about 21212.5231408241. The cubic root of 449971138 is about 766.2930489153.

The spelling of 449971138 in words is "four hundred forty-nine million, nine hundred seventy-one thousand, one hundred thirty-eight".