238815913 has 8 divisors (see below), whose sum is σ = 274105728. Its totient is φ = 203819424.

The previous prime is 238815901. The next prime is 238815943. The reversal of 238815913 is 319518832.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238815913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238815943) 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, 71581 + ... + 74842.

It is an arithmetic number, because the mean of its divisors is an integer number (34263216).

Almost surely, 2^238815913 is an apocalyptic number.

It is an amenable number.

238815913 is a deficient number, since it is larger than the sum of its proper divisors (35289815).

238815913 is a wasteful number, since it uses less digits than its factorization.

238815913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146663.

The product of its digits is 51840, while the sum is 40.

The square root of 238815913 is about 15453.6698877645. The cubic root of 238815913 is about 620.4228064698.

The spelling of 238815913 in words is "two hundred thirty-eight million, eight hundred fifteen thousand, nine hundred thirteen".