238564139 has 6 divisors (see below), whose sum is σ = 260307684. Its totient is φ = 216829920.

The previous prime is 238564099. The next prime is 238564141. The reversal of 238564139 is 931465832.

238564139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-238564139 is a prime.

It is a super-2 number, since 2×238564139² = 113825696833622642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 238564096 and 238564105.

It is not an unprimeable number, because it can be changed into a prime (238564159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48899 + ... + 53555.

It is an arithmetic number, because the mean of its divisors is an integer number (43384614).

Almost surely, 2^238564139 is an apocalyptic number.

238564139 is a deficient number, since it is larger than the sum of its proper divisors (21743545).

238564139 is an frugal number, since it uses more digits than its factorization.

238564139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9325 (or 4668 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 238564139 is about 15445.5216486851. The cubic root of 238564139 is about 620.2047008783.

The spelling of 238564139 in words is "two hundred thirty-eight million, five hundred sixty-four thousand, one hundred thirty-nine".