239128795281 has 32 divisors (see below), whose sum is σ = 338003842176. Its totient is φ = 150171840000.

The previous prime is 239128795259. The next prime is 239128795319. The reversal of 239128795281 is 182597821932.

It is not a de Polignac number, because 239128795281 - 2⁵ = 239128795249 is a prime.

It is a super-2 number, since 2×239128795281² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (239128795231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 395631 + ... + 796731.

It is an arithmetic number, because the mean of its divisors is an integer number (10562620068).

Almost surely, 2^239128795281 is an apocalyptic number.

It is an amenable number.

239128795281 is a deficient number, since it is larger than the sum of its proper divisors (98875046895).

239128795281 is a wasteful number, since it uses less digits than its factorization.

239128795281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401313.

The product of its digits is 4354560, while the sum is 57.

The spelling of 239128795281 in words is "two hundred thirty-nine billion, one hundred twenty-eight million, seven hundred ninety-five thousand, two hundred eighty-one".