238618090 has 16 divisors (see below), whose sum is σ = 444323880. Its totient is φ = 92155840.

The previous prime is 238618063. The next prime is 238618091. The reversal of 238618090 is 90816832.

238618090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 123721129 + 114896961 = 11123^2 + 10719^2 .

It is not an unprimeable number, because it can be changed into a prime (238618091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411121 + ... + 411700.

Almost surely, 2^238618090 is an apocalyptic number.

238618090 is a deficient number, since it is larger than the sum of its proper divisors (205705790).

238618090 is a wasteful number, since it uses less digits than its factorization.

238618090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822857.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 238618090 is about 15447.2680432496. The cubic root of 238618090 is about 620.2514502094.

The spelling of 238618090 in words is "two hundred thirty-eight million, six hundred eighteen thousand, ninety".