444471861 has 12 divisors (see below), whose sum is σ = 609084672. Its totient is φ = 288303408.

The previous prime is 444471847. The next prime is 444471869. The reversal of 444471861 is 168174444.

It is not a de Polignac number, because 444471861 - 2⁵ = 444471829 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444471869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50005 + ... + 58218.

It is an arithmetic number, because the mean of its divisors is an integer number (50757056).

Almost surely, 2^444471861 is an apocalyptic number.

It is an amenable number.

444471861 is a deficient number, since it is larger than the sum of its proper divisors (164612811).

444471861 is a wasteful number, since it uses less digits than its factorization.

444471861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108300 (or 108263 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 444471861 is about 21082.5012984703. The cubic root of 444471861 is about 763.1585201070.

The spelling of 444471861 in words is "four hundred forty-four million, four hundred seventy-one thousand, eight hundred sixty-one".