238618655 has 12 divisors (see below), whose sum is σ = 314740776. Its totient is φ = 173540400.

The previous prime is 238618643. The next prime is 238618657. The reversal of 238618655 is 556816832.

It is not a de Polignac number, because 238618655 - 2⁶ = 238618591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238618657) 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 11 ways as a sum of consecutive naturals, for example, 196601 + ... + 197810.

It is an arithmetic number, because the mean of its divisors is an integer number (26228398).

Almost surely, 2^238618655 is an apocalyptic number.

238618655 is a deficient number, since it is larger than the sum of its proper divisors (76122121).

238618655 is a wasteful number, since it uses less digits than its factorization.

238618655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394438 (or 394427 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

The square root of 238618655 is about 15447.2863312622. The cubic root of 238618655 is about 620.2519397529.

The spelling of 238618655 in words is "two hundred thirty-eight million, six hundred eighteen thousand, six hundred fifty-five".