239007928581 has 8 divisors (see below), whose sum is σ = 354085820160. Its totient is φ = 159338619036.

The previous prime is 239007928531. The next prime is 239007928583. The reversal of 239007928581 is 185829700932.

239007928581 is a `hidden beast` number, since 2 + 39 + 0 + 0 + 7 + 9 + 28 + 581 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-239007928581 is a prime.

It is a super-2 number, since 2×239007928581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239007928583) 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, 4426072725 + ... + 4426072778.

It is an arithmetic number, because the mean of its divisors is an integer number (44260727520).

Almost surely, 2^239007928581 is an apocalyptic number.

It is an amenable number.

239007928581 is a deficient number, since it is larger than the sum of its proper divisors (115077891579).

239007928581 is an equidigital number, since it uses as much as digits as its factorization.

239007928581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8852145512 (or 8852145506 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 239007928581 in words is "two hundred thirty-nine billion, seven million, nine hundred twenty-eight thousand, five hundred eighty-one".