3681872442 has 32 divisors (see below), whose sum is σ = 8403076800. Its totient is φ = 1194120144.

The previous prime is 3681872413. The next prime is 3681872443. The reversal of 3681872442 is 2442781863.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3681872443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 919392 + ... + 923387.

It is an arithmetic number, because the mean of its divisors is an integer number (262596150).

Almost surely, 2^3681872442 is an apocalyptic number.

3681872442 is an abundant number, since it is smaller than the sum of its proper divisors (4721204358).

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

3681872442 is a wasteful number, since it uses less digits than its factorization.

3681872442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842827 (or 1842821 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 3681872442 is about 60678.4347359093. The cubic root of 3681872442 is about 1544.1503330785.

The spelling of 3681872442 in words is "three billion, six hundred eighty-one million, eight hundred seventy-two thousand, four hundred forty-two".