1449203840 has 128 divisors (see below), whose sum is σ = 4025099520. Its totient is φ = 488632320.

The previous prime is 1449203839. The next prime is 1449203867. The reversal of 1449203840 is 483029441.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1449203840.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270629 + ... + 275931.

It is an arithmetic number, because the mean of its divisors is an integer number (31446090).

Almost surely, 2^1449203840 is an apocalyptic number.

1449203840 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 1449203840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2012549760).

1449203840 is an abundant number, since it is smaller than the sum of its proper divisors (2575895680).

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

1449203840 is an equidigital number, since it uses as much as digits as its factorization.

1449203840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5390 (or 5378 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 1449203840 is about 38068.4100009444. The cubic root of 1449203840 is about 1131.6440006460.

The spelling of 1449203840 in words is "one billion, four hundred forty-nine million, two hundred three thousand, eight hundred forty".