238128645 has 16 divisors (see below), whose sum is σ = 381205440. Its totient is φ = 126935424.

The previous prime is 238128641. The next prime is 238128647. The reversal of 238128645 is 546821832.

It is not a de Polignac number, because 238128645 - 2² = 238128641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238128641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41862 + ... + 47208.

It is an arithmetic number, because the mean of its divisors is an integer number (23825340).

Almost surely, 2^238128645 is an apocalyptic number.

It is an amenable number.

238128645 is a deficient number, since it is larger than the sum of its proper divisors (143076795).

238128645 is a wasteful number, since it uses less digits than its factorization.

238128645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8324.

The product of its digits is 92160, while the sum is 39.

The square root of 238128645 is about 15431.4174656770. The cubic root of 238128645 is about 619.8270806357.

The spelling of 238128645 in words is "two hundred thirty-eight million, one hundred twenty-eight thousand, six hundred forty-five".