168139800 has 240 divisors, whose sum is σ = 595508760. Its totient is φ = 43960320.

The previous prime is 168139799. The next prime is 168139817. The reversal of 168139800 is 8931861.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1571347 + ... + 1571453.

Almost surely, 2^168139800 is an apocalyptic number.

168139800 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 168139800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297754380).

168139800 is an abundant number, since it is smaller than the sum of its proper divisors (427368960).

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

168139800 is a wasteful number, since it uses less digits than its factorization.

168139800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 168139800 is about 12966.8731774472. The cubic root of 168139800 is about 551.9378474445.

The spelling of 168139800 in words is "one hundred sixty-eight million, one hundred thirty-nine thousand, eight hundred".