444387939 has 16 divisors (see below), whose sum is σ = 628715520. Its totient is φ = 278234240.

The previous prime is 444387901. The next prime is 444387949. The reversal of 444387939 is 939783444.

It is not a de Polignac number, because 444387939 - 2⁸ = 444387683 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 444387891 and 444387900.

It is not an unprimeable number, because it can be changed into a prime (444387949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15334 + ... + 33524.

It is an arithmetic number, because the mean of its divisors is an integer number (39294720).

Almost surely, 2^444387939 is an apocalyptic number.

444387939 is a deficient number, since it is larger than the sum of its proper divisors (184327581).

444387939 is a wasteful number, since it uses less digits than its factorization.

444387939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18690.

The product of its digits is 2612736, while the sum is 51.

The square root of 444387939 is about 21080.5108809061. The cubic root of 444387939 is about 763.1104857047.

The spelling of 444387939 in words is "four hundred forty-four million, three hundred eighty-seven thousand, nine hundred thirty-nine".