238216566 has 64 divisors (see below), whose sum is σ = 598118400. Its totient is φ = 61671456.

The previous prime is 238216553. The next prime is 238216607. The reversal of 238216566 is 665612832.

It is a congruent number.

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, 11865 + ... + 24843.

It is an arithmetic number, because the mean of its divisors is an integer number (9345600).

Almost surely, 2^238216566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238216566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299059200).

238216566 is an abundant number, since it is smaller than the sum of its proper divisors (359901834).

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

238216566 is a wasteful number, since it uses less digits than its factorization.

238216566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13033.

The product of its digits is 103680, while the sum is 39.

The square root of 238216566 is about 15434.2659689407. The cubic root of 238216566 is about 619.9033546895.

The spelling of 238216566 in words is "two hundred thirty-eight million, two hundred sixteen thousand, five hundred sixty-six".