238863889 has 16 divisors (see below), whose sum is σ = 278660736. Its totient is φ = 202336000.

The previous prime is 238863887. The next prime is 238863893. The reversal of 238863889 is 988368832.

It is a cyclic number.

It is not a de Polignac number, because 238863889 - 2¹ = 238863887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (238863883) 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 15 ways as a sum of consecutive naturals, for example, 12564 + ... + 25210.

It is an arithmetic number, because the mean of its divisors is an integer number (17416296).

Almost surely, 2^238863889 is an apocalyptic number.

It is an amenable number.

238863889 is a deficient number, since it is larger than the sum of its proper divisors (39796847).

238863889 is a wasteful number, since it uses less digits than its factorization.

238863889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12776.

The product of its digits is 3981312, while the sum is 55.

The square root of 238863889 is about 15455.2220624616. Note that the first 3 decimals coincide. The cubic root of 238863889 is about 620.4643495021.

The spelling of 238863889 in words is "two hundred thirty-eight million, eight hundred sixty-three thousand, eight hundred eighty-nine".