163890480 has 80 divisors (see below), whose sum is σ = 547152480. Its totient is φ = 40341504.

The previous prime is 163890473. The next prime is 163890481. The reversal of 163890480 is 84098361.

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

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (163890481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23145 + ... + 29384.

It is an arithmetic number, because the mean of its divisors is an integer number (6839406).

Almost surely, 2^163890480 is an apocalyptic number.

163890480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163890480 is an abundant number, since it is smaller than the sum of its proper divisors (383262000).

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

163890480 is a wasteful number, since it uses less digits than its factorization.

163890480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52558 (or 52552 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 163890480 is about 12801.9717231370. The cubic root of 163890480 is about 547.2484948129.

The spelling of 163890480 in words is "one hundred sixty-three million, eight hundred ninety thousand, four hundred eighty".