1449840 has 80 divisors (see below), whose sum is σ = 5142528. Its totient is φ = 331008.

The previous prime is 1449829. The next prime is 1449841. The reversal of 1449840 is 489441.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1449798 and 1449807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1449841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1249 + ... + 2111.

2^1449840 is an apocalyptic number.

1449840 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 1449840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2571264).

1449840 is an abundant number, since it is smaller than the sum of its proper divisors (3692688).

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

1449840 is a wasteful number, since it uses less digits than its factorization.

1449840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1449840 is about 1204.0930196625. The cubic root of 1449840 is about 113.1809563123.

The spelling of 1449840 in words is "one million, four hundred forty-nine thousand, eight hundred forty".