1440426 has 32 divisors (see below), whose sum is σ = 3165120. Its totient is φ = 434304.

The previous prime is 1440419. The next prime is 1440437. The reversal of 1440426 is 6240441.

It is a super-2 number, since 2×1440426² = 4149654122952, which contains 22 as substring.

It is a zygodrome in base 4.

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 15 ways as a sum of consecutive naturals, for example, 4446 + ... + 4758.

It is an arithmetic number, because the mean of its divisors is an integer number (98910).

2^1440426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1582560).

1440426 is an abundant number, since it is smaller than the sum of its proper divisors (1724694).

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

1440426 is a wasteful number, since it uses less digits than its factorization.

1440426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1440426 is about 1200.1774868743. The cubic root of 1440426 is about 112.9354579608.

Adding to 1440426 its reverse (6240441), we get a palindrome (7680867).

The spelling of 1440426 in words is "one million, four hundred forty thousand, four hundred twenty-six".