449915840 has 56 divisors (see below), whose sum is σ = 1168767792. Its totient is φ = 163604480.

The previous prime is 449915833. The next prime is 449915849. The reversal of 449915840 is 48519944.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 449915791 and 449915800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449915849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60389 + ... + 67428.

Almost surely, 2^449915840 is an apocalyptic number.

449915840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

449915840 is an abundant number, since it is smaller than the sum of its proper divisors (718851952).

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

449915840 is a wasteful number, since it uses less digits than its factorization.

449915840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127845 (or 127835 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 449915840 is about 21211.2196726167. The cubic root of 449915840 is about 766.2616571174.

The spelling of 449915840 in words is "four hundred forty-nine million, nine hundred fifteen thousand, eight hundred forty".