239738456538 has 384 divisors, whose sum is σ = 677652480000. Its totient is φ = 62401933440.

The previous prime is 239738456513. The next prime is 239738456539. The reversal of 239738456538 is 835654837932.

It is a happy number.

239738456538 is a `hidden beast` number, since 2 + 3 + 9 + 7 + 38 + 4 + 565 + 38 = 666.

239738456538 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (239738456539) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 310139920 + ... + 310140692.

It is an arithmetic number, because the mean of its divisors is an integer number (1764720000).

Almost surely, 2^239738456538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 239738456538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338826240000).

239738456538 is an abundant number, since it is smaller than the sum of its proper divisors (437914023462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

239738456538 is a wasteful number, since it uses less digits than its factorization.

239738456538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1034 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 63.

The spelling of 239738456538 in words is "two hundred thirty-nine billion, seven hundred thirty-eight million, four hundred fifty-six thousand, five hundred thirty-eight".