38729489656 has 128 divisors (see below), whose sum is σ = 88571750400. Its totient is φ = 15635520000.

The previous prime is 38729489639. The next prime is 38729489657. The reversal of 38729489656 is 65698492783.

It is a junction number, because it is equal to n+sod(n) for n = 38729489591 and 38729489600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38729489657) 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, 6345006 + ... + 6351106.

It is an arithmetic number, because the mean of its divisors is an integer number (691966800).

Almost surely, 2^38729489656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38729489656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44285875200).

38729489656 is an abundant number, since it is smaller than the sum of its proper divisors (49842260744).

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

38729489656 is a wasteful number, since it uses less digits than its factorization.

38729489656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6341 (or 6337 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 67.

The spelling of 38729489656 in words is "thirty-eight billion, seven hundred twenty-nine million, four hundred eighty-nine thousand, six hundred fifty-six".