1344840 has 64 divisors (see below), whose sum is σ = 4613760. Its totient is φ = 307200.

The previous prime is 1344829. The next prime is 1344857. The reversal of 1344840 is 484431.

1344840 is nontrivially palindromic in base 13.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1344840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40 + ... + 1640.

It is an arithmetic number, because the mean of its divisors is an integer number (72090).

2^1344840 is an apocalyptic number.

1344840 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 1344840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2306880).

1344840 is an abundant number, since it is smaller than the sum of its proper divisors (3268920).

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

1344840 is a wasteful number, since it uses less digits than its factorization.

1344840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622 (or 1618 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1344840 is about 1159.6723675246. The cubic root of 1344840 is about 110.3799533019.

The spelling of 1344840 in words is "one million, three hundred forty-four thousand, eight hundred forty".