163901440 has 104 divisors (see below), whose sum is σ = 403390368. Its totient is φ = 63897600.

The previous prime is 163901393. The next prime is 163901443. The reversal of 163901440 is 44109361.

It is a junction number, because it is equal to n+sod(n) for n = 163901399 and 163901408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163901443) 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, 1085365 + ... + 1085515.

Almost surely, 2^163901440 is an apocalyptic number.

163901440 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 163901440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201695184).

163901440 is an abundant number, since it is smaller than the sum of its proper divisors (239488928).

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

163901440 is an equidigital number, since it uses as much as digits as its factorization.

163901440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 163901440 is about 12802.3997750422. The cubic root of 163901440 is about 547.2606934263.

The spelling of 163901440 in words is "one hundred sixty-three million, nine hundred one thousand, four hundred forty".