238019805 has 24 divisors (see below), whose sum is σ = 436837752. Its totient is φ = 119476224.

The previous prime is 238019777. The next prime is 238019809. The reversal of 238019805 is 508910832.

It can be written as a sum of positive squares in 4 ways, for example, as 39463524 + 198556281 = 6282^2 + 14091^2 .

It is not a de Polignac number, because 238019805 - 2⁵ = 238019773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238019805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238019809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154804 + ... + 156333.

It is an arithmetic number, because the mean of its divisors is an integer number (18201573).

Almost surely, 2^238019805 is an apocalyptic number.

It is an amenable number.

238019805 is a deficient number, since it is larger than the sum of its proper divisors (198817947).

238019805 is a wasteful number, since it uses less digits than its factorization.

238019805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311165 (or 311162 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 238019805 is about 15427.8904909258. The cubic root of 238019805 is about 619.7326327233.

The spelling of 238019805 in words is "two hundred thirty-eight million, nineteen thousand, eight hundred five".