1944431 has 4 divisors (see below), whose sum is σ = 1947792. Its totient is φ = 1941072.

The previous prime is 1944401. The next prime is 1944457. The reversal of 1944431 is 1344491.

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

It is a cyclic number.

It is not a de Polignac number, because 1944431 - 2¹⁸ = 1682287 is a prime.

It is a super-2 number, since 2×1944431² = 7561623827522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1944431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566 + ... + 2051.

It is an arithmetic number, because the mean of its divisors is an integer number (486948).

2^1944431 is an apocalyptic number.

1944431 is a deficient number, since it is larger than the sum of its proper divisors (3361).

1944431 is an equidigital number, since it uses as much as digits as its factorization.

1944431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360.

The product of its digits is 1728, while the sum is 26.

The square root of 1944431 is about 1394.4285567931. The cubic root of 1944431 is about 124.8142521185.

The spelling of 1944431 in words is "one million, nine hundred forty-four thousand, four hundred thirty-one".