238163280 has 80 divisors (see below), whose sum is σ = 741648960. Its totient is φ = 63222784.

The previous prime is 238163279. The next prime is 238163281. The reversal of 238163280 is 82361832.

It is an interprime number because it is at equal distance from previous prime (238163279) and next prime (238163281).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238163281) 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, 53791 + ... + 58049.

It is an arithmetic number, because the mean of its divisors is an integer number (9270612).

Almost surely, 2^238163280 is an apocalyptic number.

238163280 is a gapful number since it is divisible by the number (20) 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 238163280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370824480).

238163280 is an abundant number, since it is smaller than the sum of its proper divisors (503485680).

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

238163280 is a wasteful number, since it uses less digits than its factorization.

238163280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508 (or 4502 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 238163280 is about 15432.5396484182. The cubic root of 238163280 is about 619.8571297579.

The spelling of 238163280 in words is "two hundred thirty-eight million, one hundred sixty-three thousand, two hundred eighty".