238896809 has 4 divisors (see below), whose sum is σ = 247134660. Its totient is φ = 230658960.

The previous prime is 238896799. The next prime is 238896851. The reversal of 238896809 is 908698832.

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 167443600 + 71453209 = 12940^2 + 8453^2 .

It is a cyclic number.

It is not a de Polignac number, because 238896809 - 2²⁴ = 222119593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238896859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4118882 + ... + 4118939.

It is an arithmetic number, because the mean of its divisors is an integer number (61783665).

Almost surely, 2^238896809 is an apocalyptic number.

238896809 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

238896809 is a deficient number, since it is larger than the sum of its proper divisors (8237851).

238896809 is an equidigital number, since it uses as much as digits as its factorization.

238896809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8237850.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 238896809 is about 15456.2870379661. The cubic root of 238896809 is about 620.4928521334.

The spelling of 238896809 in words is "two hundred thirty-eight million, eight hundred ninety-six thousand, eight hundred nine".