238531995 has 24 divisors (see below), whose sum is σ = 445260816. Its totient is φ = 117430848.

The previous prime is 238531991. The next prime is 238532027. The reversal of 238531995 is 599135832.

238531995 is a `hidden beast` number, since 23 + 8 + 531 + 9 + 95 = 666.

It is not a de Polignac number, because 238531995 - 2² = 238531991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 238531995.

It is not an unprimeable number, because it can be changed into a prime (238531991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203289 + ... + 204458.

It is an arithmetic number, because the mean of its divisors is an integer number (18552534).

Almost surely, 2^238531995 is an apocalyptic number.

238531995 is a deficient number, since it is larger than the sum of its proper divisors (206728821).

238531995 is a wasteful number, since it uses less digits than its factorization.

238531995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407771 (or 407768 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 238531995 is about 15444.4810531141. The cubic root of 238531995 is about 620.1768442811.

The spelling of 238531995 in words is "two hundred thirty-eight million, five hundred thirty-one thousand, nine hundred ninety-five".