163856240 has 20 divisors (see below), whose sum is σ = 380965944. Its totient is φ = 65542464.

The previous prime is 163856227. The next prime is 163856243. The reversal of 163856240 is 42658361.

163856240 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 (20).

It is a self number, because there is not a number n which added to its sum of digits gives 163856240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163856243) 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, 1024022 + ... + 1024181.

Almost surely, 2^163856240 is an apocalyptic number.

163856240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163856240 is an abundant number, since it is smaller than the sum of its proper divisors (217109704).

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

163856240 is a wasteful number, since it uses less digits than its factorization.

163856240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048216 (or 2048210 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 163856240 is about 12800.6343592808. The cubic root of 163856240 is about 547.2103817724.

The spelling of 163856240 in words is "one hundred sixty-three million, eight hundred fifty-six thousand, two hundred forty".