1440428 has 24 divisors (see below), whose sum is σ = 2896320. Its totient is φ = 619920.

The previous prime is 1440419. The next prime is 1440437. The reversal of 1440428 is 8240441.

It is an interprime number because it is at equal distance from previous prime (1440419) and next prime (1440437).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26 + ... + 1697.

It is an arithmetic number, because the mean of its divisors is an integer number (120680).

2^1440428 is an apocalyptic number.

It is an amenable number.

1440428 is an abundant number, since it is smaller than the sum of its proper divisors (1455892).

1440428 is a wasteful number, since it uses less digits than its factorization.

1440428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1440428 is about 1200.1783200841. The cubic root of 1440428 is about 112.9355102303.

Adding to 1440428 its reverse (8240441), we get a palindrome (9680869).

The spelling of 1440428 in words is "one million, four hundred forty thousand, four hundred twenty-eight".