393934531589858 has 16 divisors (see below), whose sum is σ = 675417541338240. Its totient is φ = 168803784599616.

The previous prime is 393934531589857. The next prime is 393934531589909. The reversal of 393934531589858 is 858985135439393.

It is a happy number.

It is a super-2 number, since 2×393934531589858² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (393934531589857) 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, 2108267198 + ... + 2108454041.

It is an arithmetic number, because the mean of its divisors is an integer number (42213596333640).

Almost surely, 2^{393934531589858} is an apocalyptic number.

393934531589858 is a deficient number, since it is larger than the sum of its proper divisors (281483009748382).

393934531589858 is a wasteful number, since it uses less digits than its factorization.

393934531589858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216727921.

The product of its digits is 15116544000, while the sum is 83.

The spelling of 393934531589858 in words is "three hundred ninety-three trillion, nine hundred thirty-four billion, five hundred thirty-one million, five hundred eighty-nine thousand, eight hundred fifty-eight".