44431904587 has 12 divisors (see below), whose sum is σ = 52266840840. Its totient is φ = 37656570336.

The previous prime is 44431904581. The next prime is 44431904639. The reversal of 44431904587 is 78540913444.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-44431904587 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 44431904587.

It is not an unprimeable number, because it can be changed into a prime (44431904581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5089873 + ... + 5098594.

It is an arithmetic number, because the mean of its divisors is an integer number (4355570070).

Almost surely, 2^44431904587 is an apocalyptic number.

44431904587 is a deficient number, since it is larger than the sum of its proper divisors (7834936253).

44431904587 is a wasteful number, since it uses less digits than its factorization.

44431904587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10188570 (or 10188563 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 44431904587 in words is "forty-four billion, four hundred thirty-one million, nine hundred four thousand, five hundred eighty-seven".