163970208 has 72 divisors (see below), whose sum is σ = 470066688. Its totient is φ = 54214272.

The previous prime is 163970201. The next prime is 163970237. The reversal of 163970208 is 802079361.

163970208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×163970208² = 53772458223126528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (163970201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34335 + ... + 38817.

It is an arithmetic number, because the mean of its divisors is an integer number (6528704).

Almost surely, 2^163970208 is an apocalyptic number.

163970208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163970208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235033344).

163970208 is an abundant number, since it is smaller than the sum of its proper divisors (306096480).

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

163970208 is a wasteful number, since it uses less digits than its factorization.

163970208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626 (or 4615 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 163970208 is about 12805.0852398569. The cubic root of 163970208 is about 547.3372206393.

The spelling of 163970208 in words is "one hundred sixty-three million, nine hundred seventy thousand, two hundred eight".