444391031 has 4 divisors (see below), whose sum is σ = 507875472. Its totient is φ = 380906592.

The previous prime is 444391021. The next prime is 444391043. The reversal of 444391031 is 130193444.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444391031 is a prime.

It is a super-2 number, since 2×444391031² = 394966776866485922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 444390985 and 444391003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444391021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31742210 + ... + 31742223.

It is an arithmetic number, because the mean of its divisors is an integer number (126968868).

Almost surely, 2^444391031 is an apocalyptic number.

444391031 is a deficient number, since it is larger than the sum of its proper divisors (63484441).

444391031 is an equidigital number, since it uses as much as digits as its factorization.

444391031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63484440.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 444391031 is about 21080.5842186596. The cubic root of 444391031 is about 763.1122555788.

The spelling of 444391031 in words is "four hundred forty-four million, three hundred ninety-one thousand, thirty-one".