163387980 has 288 divisors, whose sum is σ = 603832320. Its totient is φ = 34974720.

The previous prime is 163387937. The next prime is 163387997. The reversal of 163387980 is 89783361.

It is a happy number.

163387980 is a `hidden beast` number, since 1 + 633 + 8 + 7 + 9 + 8 + 0 = 666.

163387980 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1835776 + ... + 1835864.

It is an arithmetic number, because the mean of its divisors is an integer number (2096640).

Almost surely, 2^163387980 is an apocalyptic number.

163387980 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 163387980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301916160).

163387980 is an abundant number, since it is smaller than the sum of its proper divisors (440444340).

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

163387980 is a wasteful number, since it uses less digits than its factorization.

163387980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 163387980 is about 12782.3307733762. The cubic root of 163387980 is about 546.6886211356.

The spelling of 163387980 in words is "one hundred sixty-three million, three hundred eighty-seven thousand, nine hundred eighty".