1440724 has 6 divisors (see below), whose sum is σ = 2521274. Its totient is φ = 720360.

The previous prime is 1440707. The next prime is 1440727. The reversal of 1440724 is 4270441.

It can be written as a sum of positive squares in only one way, i.e., 1368900 + 71824 = 1170^2 + 268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1440695 and 1440704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180087 + ... + 180094.

2^1440724 is an apocalyptic number.

It is an amenable number.

1440724 is a deficient number, since it is larger than the sum of its proper divisors (1080550).

1440724 is a wasteful number, since it uses less digits than its factorization.

1440724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360185 (or 360183 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 1440724 is about 1200.3016287584. The cubic root of 1440724 is about 112.9432455750.

The spelling of 1440724 in words is "one million, four hundred forty thousand, seven hundred twenty-four".