163287840 has 48 divisors (see below), whose sum is σ = 514358208. Its totient is φ = 43543296.

The previous prime is 163287821. The next prime is 163287841. The reversal of 163287840 is 48782361.

163287840 is digitally balanced in base 3, 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 (48).

It is not an unprimeable number, because it can be changed into a prime (163287841) 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 7 ways as a sum of consecutive naturals, for example, 169612 + ... + 170571.

It is an arithmetic number, because the mean of its divisors is an integer number (10715796).

Almost surely, 2^163287840 is an apocalyptic number.

163287840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163287840 is an abundant number, since it is smaller than the sum of its proper divisors (351070368).

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

163287840 is a wasteful number, since it uses less digits than its factorization.

163287840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340201 (or 340193 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 163287840 is about 12778.4130470102. The cubic root of 163287840 is about 546.5769103746.

The spelling of 163287840 in words is "one hundred sixty-three million, two hundred eighty-seven thousand, eight hundred forty".