238904775 has 48 divisors (see below), whose sum is σ = 449137920. Its totient is φ = 124437600.

The previous prime is 238904773. The next prime is 238904779. The reversal of 238904775 is 577409832.

It is not a de Polignac number, because 238904775 - 2¹ = 238904773 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 238904775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238904773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24910 + ... + 33140.

It is an arithmetic number, because the mean of its divisors is an integer number (9357040).

Almost surely, 2^238904775 is an apocalyptic number.

238904775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

238904775 is a deficient number, since it is larger than the sum of its proper divisors (210233145).

238904775 is a wasteful number, since it uses less digits than its factorization.

238904775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8293 (or 8282 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 238904775 is about 15456.5447303076. The cubic root of 238904775 is about 620.4997488226.

The spelling of 238904775 in words is "two hundred thirty-eight million, nine hundred four thousand, seven hundred seventy-five".