1889772242 has 18 divisors (see below), whose sum is σ = 2889062949. Its totient is φ = 927088240.

The previous prime is 1889772221. The next prime is 1889772251. The reversal of 1889772242 is 2422779881.

It can be written as a sum of positive squares in 2 ways, for example, as 1799541241 + 90231001 = 42421^2 + 9499^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=30739.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3626942 + ... + 3627462.

Almost surely, 2^1889772242 is an apocalyptic number.

1889772242 is a deficient number, since it is larger than the sum of its proper divisors (999290707).

1889772242 is an frugal number, since it uses more digits than its factorization.

1889772242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 582 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 1889772242 is about 43471.5106937866. The cubic root of 1889772242 is about 1236.3359236249.

Multiplying 1889772242 by its sum of digits (50), we get a square (94488612100 = 307390²).

The spelling of 1889772242 in words is "one billion, eight hundred eighty-nine million, seven hundred seventy-two thousand, two hundred forty-two".