889161840 has 480 divisors, whose sum is σ = 3691192320. Its totient is φ = 195955200.

The previous prime is 889161811. The next prime is 889161841. The reversal of 889161840 is 48161988.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889161841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3280905 + ... + 3281175.

It is an arithmetic number, because the mean of its divisors is an integer number (7689984).

Almost surely, 2^889161840 is an apocalyptic number.

889161840 is a gapful number since it is divisible by the number (80) 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 889161840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1845596160).

889161840 is an abundant number, since it is smaller than the sum of its proper divisors (2802030480).

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

889161840 is a wasteful number, since it uses less digits than its factorization.

889161840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 889161840 is about 29818.8168779380. The cubic root of 889161840 is about 961.5981193721.

The spelling of 889161840 in words is "eight hundred eighty-nine million, one hundred sixty-one thousand, eight hundred forty".