4444493889 has 64 divisors (see below), whose sum is σ = 7373583360. Its totient is φ = 2345656320.

The previous prime is 4444493887. The next prime is 4444493917. The reversal of 4444493889 is 9883944444.

It is a happy number.

It is not a de Polignac number, because 4444493889 - 2¹ = 4444493887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (4444493887) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 453489 + ... + 463185.

It is an arithmetic number, because the mean of its divisors is an integer number (115212240).

Almost surely, 2^4444493889 is an apocalyptic number.

It is an amenable number.

4444493889 is a deficient number, since it is larger than the sum of its proper divisors (2929089471).

4444493889 is a wasteful number, since it uses less digits than its factorization.

4444493889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9790.

The product of its digits is 15925248, while the sum is 57.

The square root of 4444493889 is about 66667.0374998020. The cubic root of 4444493889 is about 1644.1474799024.

The spelling of 4444493889 in words is "four billion, four hundred forty-four million, four hundred ninety-three thousand, eight hundred eighty-nine".