238866445 has 4 divisors (see below), whose sum is σ = 286639740. Its totient is φ = 191093152.

The previous prime is 238866421. The next prime is 238866449. The reversal of 238866445 is 544668832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48260809 + 190605636 = 6947^2 + 13806^2 .

It is a cyclic number.

It is not a de Polignac number, because 238866445 - 2²⁵ = 205312013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 238866395 and 238866404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238866449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23886640 + ... + 23886649.

It is an arithmetic number, because the mean of its divisors is an integer number (71659935).

Almost surely, 2^238866445 is an apocalyptic number.

It is an amenable number.

238866445 is a deficient number, since it is larger than the sum of its proper divisors (47773295).

238866445 is an equidigital number, since it uses as much as digits as its factorization.

238866445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47773294.

The product of its digits is 1105920, while the sum is 46.

The square root of 238866445 is about 15455.3047527378. The cubic root of 238866445 is about 620.4665626191.

The spelling of 238866445 in words is "two hundred thirty-eight million, eight hundred sixty-six thousand, four hundred forty-five".