163875138 has 96 divisors (see below), whose sum is σ = 415908864. Its totient is φ = 42079488.

The previous prime is 163875119. The next prime is 163875167. The reversal of 163875138 is 831578361.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 163875138.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 278881 + ... + 279467.

It is an arithmetic number, because the mean of its divisors is an integer number (4332384).

Almost surely, 2^163875138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163875138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207954432).

163875138 is an abundant number, since it is smaller than the sum of its proper divisors (252033726).

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

163875138 is a wasteful number, since it uses less digits than its factorization.

163875138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 639 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 163875138 is about 12801.3725045403. The cubic root of 163875138 is about 547.2314180667.

The spelling of 163875138 in words is "one hundred sixty-three million, eight hundred seventy-five thousand, one hundred thirty-eight".