1440438 has 8 divisors (see below), whose sum is σ = 2880888. Its totient is φ = 480144.

The previous prime is 1440437. The next prime is 1440443. The reversal of 1440438 is 8340441.

It is a sphenic number, since it is the product of 3 distinct primes.

1440438 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120031 + ... + 120042.

It is an arithmetic number, because the mean of its divisors is an integer number (360111).

2^1440438 is an apocalyptic number.

1440438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1440438 is a wasteful number, since it uses less digits than its factorization.

1440438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240078.

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

The square root of 1440438 is about 1200.1824861245. The cubic root of 1440438 is about 112.9357715768.

Adding to 1440438 its reverse (8340441), we get a palindrome (9780879).

The spelling of 1440438 in words is "one million, four hundred forty thousand, four hundred thirty-eight".