1440738 has 48 divisors (see below), whose sum is σ = 3459456. Its totient is φ = 430560.

The previous prime is 1440737. The next prime is 1440763. The reversal of 1440738 is 8370441.

It is not an unprimeable number, because it can be changed into a prime (1440731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10933 + ... + 11063.

It is an arithmetic number, because the mean of its divisors is an integer number (72072).

2^1440738 is an apocalyptic number.

1440738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1729728).

1440738 is an abundant number, since it is smaller than the sum of its proper divisors (2018718).

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

1440738 is a wasteful number, since it uses less digits than its factorization.

1440738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1440738 is about 1200.3074606117. The cubic root of 1440738 is about 112.9436114097.

The spelling of 1440738 in words is "one million, four hundred forty thousand, seven hundred thirty-eight".