163998420 has 48 divisors (see below), whose sum is σ = 461256768. Its totient is φ = 43536640.

The previous prime is 163998407. The next prime is 163998433. The reversal of 163998420 is 24899361.

163998420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (163998407) and next prime (163998433).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7600 + ... + 19640.

It is an arithmetic number, because the mean of its divisors is an integer number (9609516).

Almost surely, 2^163998420 is an apocalyptic number.

163998420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163998420 is an abundant number, since it is smaller than the sum of its proper divisors (297258348).

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

163998420 is a wasteful number, since it uses less digits than its factorization.

163998420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12280 (or 12278 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 163998420 is about 12806.1867860812. The cubic root of 163998420 is about 547.3686096588.

The spelling of 163998420 in words is "one hundred sixty-three million, nine hundred ninety-eight thousand, four hundred twenty".