2385643444 has 24 divisors (see below), whose sum is σ = 4359898368. Its totient is φ = 1140041760.

The previous prime is 2385643441. The next prime is 2385643459. The reversal of 2385643444 is 4443465832.

It is a super-2 number, since 2×2385643444² = 11382589283800362272, 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 2385643444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2385643441) 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, 112314 + ... + 131854.

It is an arithmetic number, because the mean of its divisors is an integer number (181662432).

Almost surely, 2^2385643444 is an apocalyptic number.

It is an amenable number.

2385643444 is a deficient number, since it is larger than the sum of its proper divisors (1974254924).

2385643444 is a wasteful number, since it uses less digits than its factorization.

2385643444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20895 (or 20893 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 43.

The square root of 2385643444 is about 48843.0490858218. The cubic root of 2385643444 is about 1336.1909059727.

The spelling of 2385643444 in words is "two billion, three hundred eighty-five million, six hundred forty-three thousand, four hundred forty-four".