1872489338 has 4 divisors (see below), whose sum is σ = 2808734010. Its totient is φ = 936244668.

The previous prime is 1872489331. The next prime is 1872489383. The reversal of 1872489338 is 8339842781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8339842781 = 63487 ⋅131363.

It can be written as a sum of positive squares in only one way, i.e., 1560013009 + 312476329 = 39497^2 + 17677^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1872489338.

It is not an unprimeable number, because it can be changed into a prime (1872489331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 468122333 + ... + 468122336.

Almost surely, 2^1872489338 is an apocalyptic number.

1872489338 is a deficient number, since it is larger than the sum of its proper divisors (936244672).

1872489338 is an equidigital number, since it uses as much as digits as its factorization.

1872489338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936244671.

The product of its digits is 2322432, while the sum is 53.

The square root of 1872489338 is about 43272.2698503326. The cubic root of 1872489338 is about 1232.5554068848. Note that the first 3 decimals are identical.

The spelling of 1872489338 in words is "one billion, eight hundred seventy-two million, four hundred eighty-nine thousand, three hundred thirty-eight".