163445040 has 200 divisors, whose sum is σ = 619545168. Its totient is φ = 39605760.

The previous prime is 163445039. The next prime is 163445041. The reversal of 163445040 is 40544361.

It is an interprime number because it is at equal distance from previous prime (163445039) and next prime (163445041).

It is a super-2 number, since 2×163445040² = 53428562201203200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 163444995 and 163445013.

It is not an unprimeable number, because it can be changed into a prime (163445041) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 70134 + ... + 72426.

Almost surely, 2^163445040 is an apocalyptic number.

163445040 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 163445040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309772584).

163445040 is an abundant number, since it is smaller than the sum of its proper divisors (456100128).

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

163445040 is a wasteful number, since it uses less digits than its factorization.

163445040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329 (or 2314 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 163445040 is about 12784.5625658448. The cubic root of 163445040 is about 546.7522537686.

The spelling of 163445040 in words is "one hundred sixty-three million, four hundred forty-five thousand, forty".