1440424 has 8 divisors (see below), whose sum is σ = 2700810. Its totient is φ = 720208.

The previous prime is 1440419. The next prime is 1440437. The reversal of 1440424 is 4240441.

It can be written as a sum of positive squares in only one way, i.e., 964324 + 476100 = 982^2 + 690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90019 + ... + 90034.

2^1440424 is an apocalyptic number.

It is an amenable number.

1440424 is a deficient number, since it is larger than the sum of its proper divisors (1260386).

1440424 is a wasteful number, since it uses less digits than its factorization.

1440424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180059 (or 180055 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1440424 is about 1200.1766536640. The cubic root of 1440424 is about 112.9354056913.

Adding to 1440424 its reverse (4240441), we get a palindrome (5680865).

It can be divided in two parts, 14404 and 24, that multiplied together give a triangular number (345696 = T₈₃₁).

The spelling of 1440424 in words is "one million, four hundred forty thousand, four hundred twenty-four".