238403881 has 8 divisors (see below), whose sum is σ = 243713664. Its totient is φ = 233104080.

The previous prime is 238403873. The next prime is 238403899. The reversal of 238403881 is 188304832.

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

It is a cyclic number.

It is not a de Polignac number, because 238403881 - 2³ = 238403873 is a prime.

It is a super-2 number, since 2×238403881² = 113672820951724322, which contains 22 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 238403881.

It is not an unprimeable number, because it can be changed into a prime (238403821) 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 7 ways as a sum of consecutive naturals, for example, 66546 + ... + 70036.

It is an arithmetic number, because the mean of its divisors is an integer number (30464208).

Almost surely, 2^238403881 is an apocalyptic number.

It is an amenable number.

238403881 is a deficient number, since it is larger than the sum of its proper divisors (5309783).

238403881 is a wasteful number, since it uses less digits than its factorization.

238403881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4991.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 238403881 is about 15440.3329303484. The cubic root of 238403881 is about 620.0657933994.

The spelling of 238403881 in words is "two hundred thirty-eight million, four hundred three thousand, eight hundred eighty-one".