38387808670638 has 32 divisors (see below), whose sum is σ = 87836807784960. Its totient is φ = 10956289695840.

The previous prime is 38387808670633. The next prime is 38387808670691. The reversal of 38387808670638 is 83607680878383.

It is a self number, because there is not a number n which added to its sum of digits gives 38387808670638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38387808670633) 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, 485611618 + ... + 485690661.

It is an arithmetic number, because the mean of its divisors is an integer number (2744900243280).

Almost surely, 2^{38387808670638} is an apocalyptic number.

38387808670638 is an abundant number, since it is smaller than the sum of its proper divisors (49448999114322).

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

38387808670638 is a wasteful number, since it uses less digits than its factorization.

38387808670638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971303232.

The product of its (nonzero) digits is 1560674304, while the sum is 75.

The spelling of 38387808670638 in words is "thirty-eight trillion, three hundred eighty-seven billion, eight hundred eight million, six hundred seventy thousand, six hundred thirty-eight".