449409870 has 360 divisors, whose sum is σ = 1544872824. Its totient is φ = 93405312.

The previous prime is 449409853. The next prime is 449409871. The reversal of 449409870 is 78904944.

449409870 is a `hidden beast` number, since 4 + 494 + 0 + 98 + 70 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449409871) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 6707577 + ... + 6707643.

Almost surely, 2^449409870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 449409870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772436412).

449409870 is an abundant number, since it is smaller than the sum of its proper divisors (1095462954).

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

449409870 is a wasteful number, since it uses less digits than its factorization.

449409870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 449409870 is about 21199.2893748824. The cubic root of 449409870 is about 765.9743064596.

The spelling of 449409870 in words is "four hundred forty-nine million, four hundred nine thousand, eight hundred seventy".