238904121 has 16 divisors (see below), whose sum is σ = 324328448. Its totient is φ = 156384000.

The previous prime is 238904101. The next prime is 238904123. The reversal of 238904121 is 121409832.

It is not a de Polignac number, because 238904121 - 2⁷ = 238903993 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238904123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198321 + ... + 199521.

It is an arithmetic number, because the mean of its divisors is an integer number (20270528).

Almost surely, 2^238904121 is an apocalyptic number.

It is an amenable number.

238904121 is a deficient number, since it is larger than the sum of its proper divisors (85424327).

238904121 is a wasteful number, since it uses less digits than its factorization.

238904121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 238904121 is about 15456.5235742065. The cubic root of 238904121 is about 620.4991826177.

The spelling of 238904121 in words is "two hundred thirty-eight million, nine hundred four thousand, one hundred twenty-one".