1440831 has 8 divisors (see below), whose sum is σ = 2195584. Its totient is φ = 823320.

The previous prime is 1440823. The next prime is 1440847. The reversal of 1440831 is 1380441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1440831 - 2³ = 1440823 is a prime.

It is a super-2 number, since 2×1440831² = 4151987941122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 68611 = 1440831 / (1 + 4 + 4 + 0 + 8 + 3 + 1).

It is a Duffinian number.

1440831 is a lucky number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 1440798 and 1440807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34285 + ... + 34326.

It is an arithmetic number, because the mean of its divisors is an integer number (274448).

2^1440831 is an apocalyptic number.

1440831 is a deficient number, since it is larger than the sum of its proper divisors (754753).

1440831 is an equidigital number, since it uses as much as digits as its factorization.

1440831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68621.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1440831 is about 1200.3462000606. The cubic root of 1440831 is about 112.9460415369.

The spelling of 1440831 in words is "one million, four hundred forty thousand, eight hundred thirty-one".