163012720 has 80 divisors (see below), whose sum is σ = 418223232. Its totient is φ = 58705920.

The previous prime is 163012697. The next prime is 163012757. The reversal of 163012720 is 27210361.

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

It is a junction number, because it is equal to n+sod(n) for n = 163012691 and 163012700.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 40729 + ... + 44551.

Almost surely, 2^163012720 is an apocalyptic number.

163012720 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 163012720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209111616).

163012720 is an abundant number, since it is smaller than the sum of its proper divisors (255210512).

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

163012720 is a wasteful number, since it uses less digits than its factorization.

163012720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890 (or 3884 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 163012720 is about 12767.6434787317. The cubic root of 163012720 is about 546.2697661055.

The spelling of 163012720 in words is "one hundred sixty-three million, twelve thousand, seven hundred twenty".