44392866644 has 24 divisors (see below), whose sum is σ = 89017571328. Its totient is φ = 18975834720.

The previous prime is 44392866613. The next prime is 44392866647. The reversal of 44392866644 is 44666829344.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 44392866644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44392866647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2059067 + ... + 2080514.

It is an arithmetic number, because the mean of its divisors is an integer number (3709065472).

Almost surely, 2^44392866644 is an apocalyptic number.

It is an amenable number.

44392866644 is an abundant number, since it is smaller than the sum of its proper divisors (44624704684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

44392866644 is a wasteful number, since it uses less digits than its factorization.

44392866644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139975 (or 4139973 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 56.

The spelling of 44392866644 in words is "forty-four billion, three hundred ninety-two million, eight hundred sixty-six thousand, six hundred forty-four".