163861628 has 12 divisors (see below), whose sum is σ = 327723312. Its totient is φ = 70226400.

The previous prime is 163861627. The next prime is 163861651. The reversal of 163861628 is 826168361.

163861628 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163861627) 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 3 ways as a sum of consecutive naturals, for example, 2926073 + ... + 2926128.

It is an arithmetic number, because the mean of its divisors is an integer number (27310276).

Almost surely, 2^163861628 is an apocalyptic number.

It is an amenable number.

163861628 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.

163861628 is a wasteful number, since it uses less digits than its factorization.

163861628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852212 (or 5852210 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 163861628 is about 12800.8448158706. The cubic root of 163861628 is about 547.2163795853.

The spelling of 163861628 in words is "one hundred sixty-three million, eight hundred sixty-one thousand, six hundred twenty-eight".