2044604391 has 4 divisors (see below), whose sum is σ = 2726139192. Its totient is φ = 1363069592.

The previous prime is 2044604351. The next prime is 2044604431. The reversal of 2044604391 is 1934064402.

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

It is an interprime number because it is at equal distance from previous prime (2044604351) and next prime (2044604431).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2044604391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2044604351) 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, 340767396 + ... + 340767401.

It is an arithmetic number, because the mean of its divisors is an integer number (681534798).

Almost surely, 2^2044604391 is an apocalyptic number.

2044604391 is a deficient number, since it is larger than the sum of its proper divisors (681534801).

2044604391 is an equidigital number, since it uses as much as digits as its factorization.

2044604391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681534800.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 2044604391 is about 45217.3018987201. The cubic root of 2044604391 is about 1269.2186052402.

Adding to 2044604391 its reverse (1934064402), we get a palindrome (3978668793).

The spelling of 2044604391 in words is "two billion, forty-four million, six hundred four thousand, three hundred ninety-one".