238712789810889 has 27 divisors (see below), whose sum is σ = 345774092755143. Its totient is φ = 158696921184192.

The previous prime is 238712789810839. The next prime is 238712789810899. The reversal of 238712789810889 is 988018987217832.

The square root of 238712789810889 is 15450333.

It is a perfect power (a square), and thus also a powerful number.

238712789810889 is a `hidden beast` number, since 2 + 3 + 87 + 1 + 278 + 98 + 108 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27754826841225 + 210957962969664 = 5268285^2 + 14524392^2 .

It is not a de Polignac number, because 238712789810889 - 2⁹ = 238712789810377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (238712789810839) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17010809617 + ... + 17010823649.

Almost surely, 2^{238712789810889} is an apocalyptic number.

238712789810889 is the 15450333-rd square number.

238712789810889 is the 7725167-th centered octagonal number.

It is an amenable number.

238712789810889 is a deficient number, since it is larger than the sum of its proper divisors (107061302944254).

238712789810889 is an frugal number, since it uses more digits than its factorization.

238712789810889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28806 (or 14403 counting only the distinct ones).

The product of its (nonzero) digits is 1560674304, while the sum is 81.

The spelling of 238712789810889 in words is "two hundred thirty-eight trillion, seven hundred twelve billion, seven hundred eighty-nine million, eight hundred ten thousand, eight hundred eighty-nine".