1889917172 has 48 divisors (see below), whose sum is σ = 3890763072. Its totient is φ = 791911680.

The previous prime is 1889917163. The next prime is 1889917187. The reversal of 1889917172 is 2717199881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543383 + ... + 546849.

It is an arithmetic number, because the mean of its divisors is an integer number (81057564).

Almost surely, 2^1889917172 is an apocalyptic number.

It is an amenable number.

1889917172 is an abundant number, since it is smaller than the sum of its proper divisors (2000845900).

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

1889917172 is a wasteful number, since it uses less digits than its factorization.

1889917172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4448 (or 4446 counting only the distinct ones).

The product of its digits is 508032, while the sum is 53.

The square root of 1889917172 is about 43473.1776156287. The cubic root of 1889917172 is about 1236.3675284185.

The spelling of 1889917172 in words is "one billion, eight hundred eighty-nine million, nine hundred seventeen thousand, one hundred seventy-two".