163878738 has 8 divisors (see below), whose sum is σ = 327757488. Its totient is φ = 54626244.

The previous prime is 163878683. The next prime is 163878751. The reversal of 163878738 is 837878361.

It is a sphenic number, since it is the product of 3 distinct primes.

163878738 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13656556 + ... + 13656567.

It is an arithmetic number, because the mean of its divisors is an integer number (40969686).

Almost surely, 2^163878738 is an apocalyptic number.

163878738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

163878738 is a wasteful number, since it uses less digits than its factorization.

163878738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27313128.

The product of its digits is 1354752, while the sum is 51.

The square root of 163878738 is about 12801.5131136909. The cubic root of 163878738 is about 547.2354252206.

The spelling of 163878738 in words is "one hundred sixty-three million, eight hundred seventy-eight thousand, seven hundred thirty-eight".