238730817 has 16 divisors (see below), whose sum is σ = 343732928. Its totient is φ = 146508480.

The previous prime is 238730773. The next prime is 238730837. The reversal of 238730817 is 718037832.

It is not a de Polignac number, because 238730817 - 2⁸ = 238730561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (238730837) 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, 6342 + ... + 22752.

It is an arithmetic number, because the mean of its divisors is an integer number (21483308).

Almost surely, 2^238730817 is an apocalyptic number.

It is an amenable number.

238730817 is a deficient number, since it is larger than the sum of its proper divisors (105002111).

238730817 is a wasteful number, since it uses less digits than its factorization.

238730817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16800.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 238730817 is about 15450.9163805905. The cubic root of 238730817 is about 620.3491070661.

The spelling of 238730817 in words is "two hundred thirty-eight million, seven hundred thirty thousand, eight hundred seventeen".