163885790 has 8 divisors (see below), whose sum is σ = 294994440. Its totient is φ = 65554312.

The previous prime is 163885789. The next prime is 163885793. The reversal of 163885790 is 97588361.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163885793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8194280 + ... + 8194299.

It is an arithmetic number, because the mean of its divisors is an integer number (36874305).

Almost surely, 2^163885790 is an apocalyptic number.

163885790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163885790 is a deficient number, since it is larger than the sum of its proper divisors (131108650).

163885790 is a wasteful number, since it uses less digits than its factorization.

163885790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16388586.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 163885790 is about 12801.7885469180. The cubic root of 163885790 is about 547.2432746197.

The spelling of 163885790 in words is "one hundred sixty-three million, eight hundred eighty-five thousand, seven hundred ninety".