449920143 has 32 divisors (see below), whose sum is σ = 702750720. Its totient is φ = 284070240.

The previous prime is 449920139. The next prime is 449920169. The reversal of 449920143 is 341029944.

449920143 is a `hidden beast` number, since 4 + 499 + 20 + 143 = 666.

It is not a de Polignac number, because 449920143 - 2² = 449920139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 449920098 and 449920107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449927143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33621 + ... + 45057.

It is an arithmetic number, because the mean of its divisors is an integer number (21960960).

Almost surely, 2^449920143 is an apocalyptic number.

449920143 is a deficient number, since it is larger than the sum of its proper divisors (252830577).

449920143 is a wasteful number, since it uses less digits than its factorization.

449920143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11524 (or 11518 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 449920143 is about 21211.3211045423. The cubic root of 449920143 is about 766.2640999546.

It can be divided in two parts, 4499 and 20143, that added together give a palindrome (24642).

The spelling of 449920143 in words is "four hundred forty-nine million, nine hundred twenty thousand, one hundred forty-three".