1889812872 has 96 divisors (see below), whose sum is σ = 5176922400. Its totient is φ = 622764288.

The previous prime is 1889812861. The next prime is 1889812901. The reversal of 1889812872 is 2782189881.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3321004 + ... + 3321572.

It is an arithmetic number, because the mean of its divisors is an integer number (53926275).

Almost surely, 2^1889812872 is an apocalyptic number.

1889812872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1889812872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2588461200).

1889812872 is an abundant number, since it is smaller than the sum of its proper divisors (3287109528).

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

1889812872 is a wasteful number, since it uses less digits than its factorization.

1889812872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 1020 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 54.

The square root of 1889812872 is about 43471.9780088277. The cubic root of 1889812872 is about 1236.3447839463.

The spelling of 1889812872 in words is "one billion, eight hundred eighty-nine million, eight hundred twelve thousand, eight hundred seventy-two".