1440432 has 60 divisors (see below), whose sum is σ = 4610320. Its totient is φ = 411264.

The previous prime is 1440419. The next prime is 1440437. The reversal of 1440432 is 2340441.

It is a Harshad number since it is a multiple of its sum of digits (18).

1440432 is a modest number, since divided by 432 gives 144 as remainder.

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 11 ways as a sum of consecutive naturals, for example, 294 + ... + 1722.

2^1440432 is an apocalyptic number.

1440432 is a gapful number since it is divisible by the number (12) 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 1440432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2305160).

1440432 is an abundant number, since it is smaller than the sum of its proper divisors (3169888).

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

1440432 is a wasteful number, since it uses less digits than its factorization.

1440432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450 (or 1441 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1440432 is about 1200.1799865020. The cubic root of 1440432 is about 112.9356147690.

Adding to 1440432 its reverse (2340441), we get a palindrome (3780873).

Subtracting 1440432 from its reverse (2340441), we obtain a palindrome (900009).

The spelling of 1440432 in words is "one million, four hundred forty thousand, four hundred thirty-two".