238723157 has 8 divisors (see below), whose sum is σ = 254922240. Its totient is φ = 223055280.

The previous prime is 238723151. The next prime is 238723159. The reversal of 238723157 is 751327832.

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 238723157 - 2⁸ = 238722901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 238723157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238723151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131873 + ... + 133670.

It is an arithmetic number, because the mean of its divisors is an integer number (31865280).

Almost surely, 2^238723157 is an apocalyptic number.

It is an amenable number.

238723157 is a deficient number, since it is larger than the sum of its proper divisors (16199083).

238723157 is a wasteful number, since it uses less digits than its factorization.

238723157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265603.

The product of its digits is 70560, while the sum is 38.

The square root of 238723157 is about 15450.6684968645. The cubic root of 238723157 is about 620.3424720827.

The spelling of 238723157 in words is "two hundred thirty-eight million, seven hundred twenty-three thousand, one hundred fifty-seven".