238012391 has 4 divisors (see below), whose sum is σ = 239588784. Its totient is φ = 236436000.

The previous prime is 238012387. The next prime is 238012447. The reversal of 238012391 is 193210832.

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

It is a cyclic number.

It is not a de Polignac number, because 238012391 - 2² = 238012387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238012321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787970 + ... + 788271.

It is an arithmetic number, because the mean of its divisors is an integer number (59897196).

Almost surely, 2^238012391 is an apocalyptic number.

238012391 is a deficient number, since it is larger than the sum of its proper divisors (1576393).

238012391 is a wasteful number, since it uses less digits than its factorization.

238012391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576392.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 238012391 is about 15427.6502099315. The cubic root of 238012391 is about 619.7261980411.

The spelling of 238012391 in words is "two hundred thirty-eight million, twelve thousand, three hundred ninety-one".