238741781 has 8 divisors (see below), whose sum is σ = 241903200. Its totient is φ = 235587312.

The previous prime is 238741777. The next prime is 238741801. The reversal of 238741781 is 187147832.

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 238741781 - 2² = 238741777 is a prime.

It is a super-2 number, since 2×238741781² = 113995275990103922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238741751) 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, 139670 + ... + 141368.

It is an arithmetic number, because the mean of its divisors is an integer number (30237900).

Almost surely, 2^238741781 is an apocalyptic number.

It is an amenable number.

238741781 is a deficient number, since it is larger than the sum of its proper divisors (3161419).

238741781 is a wasteful number, since it uses less digits than its factorization.

238741781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3475.

The product of its digits is 75264, while the sum is 41.

The square root of 238741781 is about 15451.2711774792. The cubic root of 238741781 is about 620.3586036804.

The spelling of 238741781 in words is "two hundred thirty-eight million, seven hundred forty-one thousand, seven hundred eighty-one".