238358991 has 8 divisors (see below), whose sum is σ = 342259120. Its totient is φ = 146682432.

The previous prime is 238358983. The next prime is 238358993. The reversal of 238358991 is 199853832.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 238358991 - 2³ = 238358983 is a prime.

It is a super-4 number, since 4×238358991⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 238358991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238358993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3055846 + ... + 3055923.

It is an arithmetic number, because the mean of its divisors is an integer number (42782390).

Almost surely, 2^238358991 is an apocalyptic number.

238358991 is a deficient number, since it is larger than the sum of its proper divisors (103900129).

238358991 is a wasteful number, since it uses less digits than its factorization.

238358991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6111785.

The product of its digits is 466560, while the sum is 48.

The square root of 238358991 is about 15438.8792015483. The cubic root of 238358991 is about 620.0268727513.

The spelling of 238358991 in words is "two hundred thirty-eight million, three hundred fifty-eight thousand, nine hundred ninety-one".