163138880 has 56 divisors (see below), whose sum is σ = 396776448. Its totient is φ = 63861248.

The previous prime is 163138853. The next prime is 163138889. The reversal of 163138880 is 88831361.

It is a super-2 number, since 2×163138880² = 53228588335308800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163138889) 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, 9617 + ... + 20463.

Almost surely, 2^163138880 is an apocalyptic number.

163138880 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 163138880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198388224).

163138880 is an abundant number, since it is smaller than the sum of its proper divisors (233637568).

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

163138880 is a wasteful number, since it uses less digits than its factorization.

163138880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10911 (or 10901 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 163138880 is about 12772.5831373297. The cubic root of 163138880 is about 546.4106541342.

The spelling of 163138880 in words is "one hundred sixty-three million, one hundred thirty-eight thousand, eight hundred eighty".