1440394 has 4 divisors (see below), whose sum is σ = 2160594. Its totient is φ = 720196.

The previous prime is 1440391. The next prime is 1440403. The reversal of 1440394 is 4930441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1177225 + 263169 = 1085^2 + 513^2 .

It is not an unprimeable number, because it can be changed into a prime (1440391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360097 + ... + 360100.

2^1440394 is an apocalyptic number.

1440394 is a deficient number, since it is larger than the sum of its proper divisors (720200).

1440394 is an equidigital number, since it uses as much as digits as its factorization.

1440394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720199.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1440394 is about 1200.1641554387. The cubic root of 1440394 is about 112.9346216431.

It can be divided in two parts, 14 and 40394, that multiplied together give a triangular number (565516 = T₁₀₆₃).

The spelling of 1440394 in words is "one million, four hundred forty thousand, three hundred ninety-four".