40444000423 has 6 divisors (see below), whose sum is σ = 42278889464. Its totient is φ = 38685565116.

The previous prime is 40444000403. The next prime is 40444000427. The reversal of 40444000423 is 32400044404.

It is a de Polignac number, because none of the positive numbers 2^k-40444000423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40444000427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38226315 + ... + 38227372.

Almost surely, 2^40444000423 is an apocalyptic number.

40444000423 is a deficient number, since it is larger than the sum of its proper divisors (1834889041).

40444000423 is an equidigital number, since it uses as much as digits as its factorization.

40444000423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76453733 (or 76453710 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

Adding to 40444000423 its reverse (32400044404), we get a palindrome (72844044827).

The spelling of 40444000423 in words is "forty billion, four hundred forty-four million, four hundred twenty-three", and thus it is an aban number.