163878 has 32 divisors (see below), whose sum is σ = 387072. Its totient is φ = 45600.

The previous prime is 163871. The next prime is 163883. The reversal of 163878 is 878361.

163878 is a nontrivial binomial coefficient, being equal to C(573, 2).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163871) by changing a digit.

163878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 763 + ... + 953.

It is an arithmetic number, because the mean of its divisors is an integer number (12096).

2¹⁶³⁸⁷⁸ is an apocalyptic number.

163878 is the 572-nd triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193536).

163878 is an abundant number, since it is smaller than the sum of its proper divisors (223194).

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

163878 is a wasteful number, since it uses less digits than its factorization.

163878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220.

The product of its digits is 8064, while the sum is 33.

The square root of 163878 is about 404.8184778391. The cubic root of 163878 is about 54.7234603759.

The spelling of 163878 in words is "one hundred sixty-three thousand, eight hundred seventy-eight".