238478587 has 4 divisors (see below), whose sum is σ = 238957000. Its totient is φ = 238000176.

The previous prime is 238478573. The next prime is 238478599. The reversal of 238478587 is 785874832.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238478587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238478507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238458 + ... + 239455.

It is an arithmetic number, because the mean of its divisors is an integer number (59739250).

Almost surely, 2^238478587 is an apocalyptic number.

238478587 is a deficient number, since it is larger than the sum of its proper divisors (478413).

238478587 is an equidigital number, since it uses as much as digits as its factorization.

238478587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478412.

The product of its digits is 3010560, while the sum is 52.

The square root of 238478587 is about 15442.7519244466. The cubic root of 238478587 is about 620.1305543662.

The spelling of 238478587 in words is "two hundred thirty-eight million, four hundred seventy-eight thousand, five hundred eighty-seven".