1440340 has 24 divisors (see below), whose sum is σ = 3300192. Its totient is φ = 523680.

The previous prime is 1440317. The next prime is 1440349. The reversal of 1440340 is 430441.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3054 + ... + 3493.

It is an arithmetic number, because the mean of its divisors is an integer number (137508).

2^1440340 is an apocalyptic number.

1440340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440340 is an abundant number, since it is smaller than the sum of its proper divisors (1859852).

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

1440340 is a wasteful number, since it uses less digits than its factorization.

1440340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6567 (or 6565 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1440340 is about 1200.1416583054. The cubic root of 1440340 is about 112.9332103288.

Adding to 1440340 its reverse (430441), we get a palindrome (1870781).

The spelling of 1440340 in words is "one million, four hundred forty thousand, three hundred forty".