1944444491 has 4 divisors (see below), whose sum is σ = 2121212184. Its totient is φ = 1767676800.

The previous prime is 1944444431. The next prime is 1944444503.

1944444491 is nontrivially palindromic in base 10.

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 1944444491 - 2¹⁰ = 1944443467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1944444431) 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, 88383830 + ... + 88383851.

It is an arithmetic number, because the mean of its divisors is an integer number (530303046).

Almost surely, 2^1944444491 is an apocalyptic number.

1944444491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1944444491 is a deficient number, since it is larger than the sum of its proper divisors (176767693).

1944444491 is a wasteful number, since it uses less digits than its factorization.

1944444491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176767692.

The product of its digits is 331776, while the sum is 44.

The square root of 1944444491 is about 44095.8557123002. The cubic root of 1944444491 is about 1248.1454078311.

The spelling of 1944444491 in words is "one billion, nine hundred forty-four million, four hundred forty-four thousand, four hundred ninety-one".