444120381 has 8 divisors (see below), whose sum is σ = 657956160. Its totient is φ = 296080236.

The previous prime is 444120379. The next prime is 444120401. The reversal of 444120381 is 183021444.

It is not a de Polignac number, because 444120381 - 2¹ = 444120379 is a prime.

It is a super-2 number, since 2×444120381² = 394485825639170322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 16448903 = 444120381 / (4 + 4 + 4 + 1 + 2 + 0 + 3 + 8 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444120311) 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, 8224425 + ... + 8224478.

It is an arithmetic number, because the mean of its divisors is an integer number (82244520).

Almost surely, 2^444120381 is an apocalyptic number.

It is an amenable number.

444120381 is a deficient number, since it is larger than the sum of its proper divisors (213835779).

444120381 is a wasteful number, since it uses less digits than its factorization.

444120381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16448912 (or 16448906 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 444120381 is about 21074.1638268283. The cubic root of 444120381 is about 762.9573032500.

The spelling of 444120381 in words is "four hundred forty-four million, one hundred twenty thousand, three hundred eighty-one".