238426979889 has 16 divisors (see below), whose sum is σ = 363328781312. Its totient is φ = 136239684048.

The previous prime is 238426979851. The next prime is 238426979909. The reversal of 238426979889 is 988979624832.

It is not a de Polignac number, because 238426979889 - 2⁹ = 238426979377 is a prime.

It is a super-2 number, since 2×238426979889² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 238426979889.

It is not an unprimeable number, because it can be changed into a prime (238426979839) 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, 574932 + ... + 898554.

It is an arithmetic number, because the mean of its divisors is an integer number (22708048832).

Almost surely, 2^238426979889 is an apocalyptic number.

It is an amenable number.

238426979889 is a deficient number, since it is larger than the sum of its proper divisors (124901801423).

238426979889 is a wasteful number, since it uses less digits than its factorization.

238426979889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358716.

The product of its digits is 752467968, while the sum is 75.

The spelling of 238426979889 in words is "two hundred thirty-eight billion, four hundred twenty-six million, nine hundred seventy-nine thousand, eight hundred eighty-nine".