444861989 has 32 divisors (see below), whose sum is σ = 543763584. Its totient is φ = 358490880.

The previous prime is 444861979. The next prime is 444862009. The reversal of 444861989 is 989168444.

It is not a de Polignac number, because 444861989 - 2⁸ = 444861733 is a prime.

It is a super-2 number, since 2×444861989² = 395804378514072242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 444861989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444861919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438647 + ... + 439659.

It is an arithmetic number, because the mean of its divisors is an integer number (16992612).

Almost surely, 2^444861989 is an apocalyptic number.

It is an amenable number.

444861989 is a deficient number, since it is larger than the sum of its proper divisors (98901595).

444861989 is a wasteful number, since it uses less digits than its factorization.

444861989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157.

The product of its digits is 1990656, while the sum is 53.

The square root of 444861989 is about 21091.7516816409. The cubic root of 444861989 is about 763.3817381677.

The spelling of 444861989 in words is "four hundred forty-four million, eight hundred sixty-one thousand, nine hundred eighty-nine".