163841840 has 40 divisors (see below), whose sum is σ = 381465168. Its totient is φ = 65445120.

The previous prime is 163841837. The next prime is 163841849. The reversal of 163841840 is 48148361.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 163841840.

It is not an unprimeable number, because it can be changed into a prime (163841849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109739 + ... + 111221.

Almost surely, 2^163841840 is an apocalyptic number.

163841840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163841840 is an abundant number, since it is smaller than the sum of its proper divisors (217623328).

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

163841840 is a wasteful number, since it uses less digits than its factorization.

163841840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877 (or 2871 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 163841840 is about 12800.0718747982. The cubic root of 163841840 is about 547.1943513376.

The spelling of 163841840 in words is "one hundred sixty-three million, eight hundred forty-one thousand, eight hundred forty".