238153906 has 4 divisors (see below), whose sum is σ = 357230862. Its totient is φ = 119076952.

The previous prime is 238153879. The next prime is 238153907. The reversal of 238153906 is 609351832.

238153906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 191573281 + 46580625 = 13841^2 + 6825^2 .

It is not an unprimeable number, because it can be changed into a prime (238153907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59538475 + ... + 59538478.

Almost surely, 2^238153906 is an apocalyptic number.

238153906 is a deficient number, since it is larger than the sum of its proper divisors (119076956).

238153906 is a wasteful number, since it uses less digits than its factorization.

238153906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119076955.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 238153906 is about 15432.2359365064. The cubic root of 238153906 is about 619.8489972182.

The spelling of 238153906 in words is "two hundred thirty-eight million, one hundred fifty-three thousand, nine hundred six".