238555287 has 24 divisors (see below), whose sum is σ = 372887424. Its totient is φ = 152118648.

The previous prime is 238555283. The next prime is 238555307. The reversal of 238555287 is 782555832.

It is not a de Polignac number, because 238555287 - 2² = 238555283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238555283) 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, 15753 + ... + 26930.

It is an arithmetic number, because the mean of its divisors is an integer number (15536976).

Almost surely, 2^238555287 is an apocalyptic number.

238555287 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

238555287 is a deficient number, since it is larger than the sum of its proper divisors (134332137).

238555287 is an equidigital number, since it uses as much as digits as its factorization.

238555287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42721 (or 42709 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 238555287 is about 15445.2350904737. The cubic root of 238555287 is about 620.1970298177.

The spelling of 238555287 in words is "two hundred thirty-eight million, five hundred fifty-five thousand, two hundred eighty-seven".