1440449280 has 216 divisors, whose sum is σ = 5246907120. Its totient is φ = 363847680.

The previous prime is 1440449251. The next prime is 1440449323. The reversal of 1440449280 is 829440441.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 215590 + ... + 222170.

Almost surely, 2^1440449280 is an apocalyptic number.

1440449280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440449280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2623453560).

1440449280 is an abundant number, since it is smaller than the sum of its proper divisors (3806457840).

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

1440449280 is a wasteful number, since it uses less digits than its factorization.

1440449280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6627 (or 6610 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 1440449280 is about 37953.2512441293. The cubic root of 1440449280 is about 1129.3606637419.

The spelling of 1440449280 in words is "one billion, four hundred forty million, four hundred forty-nine thousand, two hundred eighty".