1889269921 has 72 divisors (see below), whose sum is σ = 2629697280. Its totient is φ = 1347192000.

The previous prime is 1889269903. The next prime is 1889269957. The reversal of 1889269921 is 1299629881.

It is not a de Polignac number, because 1889269921 - 2⁷ = 1889269793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1889269901) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3491911 + ... + 3492451.

Almost surely, 2^1889269921 is an apocalyptic number.

1889269921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1889269921 is a deficient number, since it is larger than the sum of its proper divisors (740427359).

1889269921 is a wasteful number, since it uses less digits than its factorization.

1889269921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 609 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 55.

The square root of 1889269921 is about 43465.7327213059. The cubic root of 1889269921 is about 1236.2263702939.

The spelling of 1889269921 in words is "one billion, eight hundred eighty-nine million, two hundred sixty-nine thousand, nine hundred twenty-one".