238712817 has 16 divisors (see below), whose sum is σ = 363975552. Its totient is φ = 136323840.

The previous prime is 238712801. The next prime is 238712857. The reversal of 238712817 is 718217832.

It is not a de Polignac number, because 238712817 - 2⁴ = 238712801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (238712857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52873 + ... + 57209.

It is an arithmetic number, because the mean of its divisors is an integer number (22748472).

Almost surely, 2^238712817 is an apocalyptic number.

It is an amenable number.

238712817 is a deficient number, since it is larger than the sum of its proper divisors (125262735).

238712817 is a wasteful number, since it uses less digits than its factorization.

238712817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6968.

The product of its digits is 37632, while the sum is 39.

The square root of 238712817 is about 15450.3338798875. Note that the first 3 decimals coincide. The cubic root of 238712817 is about 620.3335154963. Note that the first 3 decimals are identical.

The spelling of 238712817 in words is "two hundred thirty-eight million, seven hundred twelve thousand, eight hundred seventeen".