238491789 has 8 divisors (see below), whose sum is σ = 318951072. Its totient is φ = 158513520.

The previous prime is 238491779. The next prime is 238491791. The reversal of 238491789 is 987194832.

238491789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 238491789 - 2²⁷ = 104274061 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238491709) 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, 119094 + ... + 121079.

It is an arithmetic number, because the mean of its divisors is an integer number (39868884).

Almost surely, 2^238491789 is an apocalyptic number.

It is an amenable number.

238491789 is a deficient number, since it is larger than the sum of its proper divisors (80459283).

238491789 is a wasteful number, since it uses less digits than its factorization.

238491789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240507.

The product of its digits is 870912, while the sum is 51.

The square root of 238491789 is about 15443.1793682519. The cubic root of 238491789 is about 620.1419974796.

The spelling of 238491789 in words is "two hundred thirty-eight million, four hundred ninety-one thousand, seven hundred eighty-nine".