2139441444 has 48 divisors (see below), whose sum is σ = 6339088000. Its totient is φ = 611268768.

The previous prime is 2139441443. The next prime is 2139441461. The reversal of 2139441444 is 4441449312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2139441399 and 2139441408.

It is not an unprimeable number, because it can be changed into a prime (2139441443) 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, 1414219 + ... + 1415730.

Almost surely, 2^2139441444 is an apocalyptic number.

It is an amenable number.

2139441444 is an abundant number, since it is smaller than the sum of its proper divisors (4199646556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139441444 is a wasteful number, since it uses less digits than its factorization.

2139441444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829969 (or 2829961 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 2139441444 is about 46254.0965104714. The cubic root of 2139441444 is about 1288.5466162641.

The spelling of 2139441444 in words is "two billion, one hundred thirty-nine million, four hundred forty-one thousand, four hundred forty-four".