168889860 has 288 divisors, whose sum is σ = 587059200. Its totient is φ = 40590720.

The previous prime is 168889843. The next prime is 168889927. The reversal of 168889860 is 68988861.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 168889797 and 168889806.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2862511 + ... + 2862569.

It is an arithmetic number, because the mean of its divisors is an integer number (2038400).

Almost surely, 2^168889860 is an apocalyptic number.

168889860 is a gapful number since it is divisible by the number (10) 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 168889860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293529600).

168889860 is an abundant number, since it is smaller than the sum of its proper divisors (418169340).

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

168889860 is a wasteful number, since it uses less digits than its factorization.

168889860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The square root of 168889860 is about 12995.7631557366. The cubic root of 168889860 is about 552.7573489042.

Subtracting from 168889860 its reverse (68988861), we obtain a palindrome (99900999).

The spelling of 168889860 in words is "one hundred sixty-eight million, eight hundred eighty-nine thousand, eight hundred sixty".