238542018 has 64 divisors (see below), whose sum is σ = 574245504. Its totient is φ = 65088000.

The previous prime is 238541999. The next prime is 238542049. The reversal of 238542018 is 810245832.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 238542018.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31788 + ... + 38568.

It is an arithmetic number, because the mean of its divisors is an integer number (8972586).

Almost surely, 2^238542018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238542018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287122752).

238542018 is an abundant number, since it is smaller than the sum of its proper divisors (335703486).

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

238542018 is a wasteful number, since it uses less digits than its factorization.

238542018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6851.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 238542018 is about 15444.8055345479. The cubic root of 238542018 is about 620.1855306706.

The spelling of 238542018 in words is "two hundred thirty-eight million, five hundred forty-two thousand, eighteen".