163043440 has 80 divisors (see below), whose sum is σ = 434972160. Its totient is φ = 55676160.

The previous prime is 163043411. The next prime is 163043443. The reversal of 163043440 is 44340361.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163043443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200635 + ... + 201445.

It is an arithmetic number, because the mean of its divisors is an integer number (5437152).

Almost surely, 2^163043440 is an apocalyptic number.

163043440 is a gapful number since it is divisible by the number (10) 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 163043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217486080).

163043440 is an abundant number, since it is smaller than the sum of its proper divisors (271928720).

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

163043440 is a wasteful number, since it uses less digits than its factorization.

163043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 163043440 is about 12768.8464631696. The cubic root of 163043440 is about 546.3040790785.

The spelling of 163043440 in words is "one hundred sixty-three million, forty-three thousand, four hundred forty".