238990481 has 4 divisors (see below), whose sum is σ = 239242212. Its totient is φ = 238738752.

The previous prime is 238990463. The next prime is 238990483. The reversal of 238990481 is 184099832.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168766081 + 70224400 = 12991^2 + 8380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238990481 is a prime.

It is a super-2 number, since 2×238990481² = 114232900017222722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238990483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124436 + ... + 126341.

It is an arithmetic number, because the mean of its divisors is an integer number (59810553).

Almost surely, 2^238990481 is an apocalyptic number.

It is an amenable number.

238990481 is a deficient number, since it is larger than the sum of its proper divisors (251731).

238990481 is an equidigital number, since it uses as much as digits as its factorization.

238990481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251730.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 238990481 is about 15459.3169642129. The cubic root of 238990481 is about 620.5739404377.

The spelling of 238990481 in words is "two hundred thirty-eight million, nine hundred ninety thousand, four hundred eighty-one".