163386890 has 32 divisors (see below), whose sum is σ = 311351040. Its totient is φ = 61560000.

The previous prime is 163386889. The next prime is 163386893. The reversal of 163386890 is 98683361.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163386893) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 32015 + ... + 36765.

It is an arithmetic number, because the mean of its divisors is an integer number (9729720).

Almost surely, 2^163386890 is an apocalyptic number.

163386890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163386890 is a deficient number, since it is larger than the sum of its proper divisors (147964150).

163386890 is a wasteful number, since it uses less digits than its factorization.

163386890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 163386890 is about 12782.2881363236. The cubic root of 163386890 is about 546.6874054364.

The spelling of 163386890 in words is "one hundred sixty-three million, three hundred eighty-six thousand, eight hundred ninety".