1940440 has 32 divisors (see below), whose sum is σ = 4410000. Its totient is φ = 768384.

The previous prime is 1940437. The next prime is 1940443. The reversal of 1940440 is 440491.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1940437) and next prime (1940443).

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940443) by changing a digit.

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, 5386 + ... + 5734.

2^1940440 is an apocalyptic number.

1940440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1940440 is an abundant number, since it is smaller than the sum of its proper divisors (2469560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1940440 is a wasteful number, since it uses less digits than its factorization.

1940440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1940440 is about 1392.9967695584. The cubic root of 1940440 is about 124.7287986910.

The spelling of 1940440 in words is "one million, nine hundred forty thousand, four hundred forty".