387728008638 has 16 divisors (see below), whose sum is σ = 809171496576. Its totient is φ = 123623423000.

The previous prime is 387728008637. The next prime is 387728008663. The reversal of 387728008638 is 836800827783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387728008637) 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, 1404811488 + ... + 1404811763.

It is an arithmetic number, because the mean of its divisors is an integer number (50573218536).

Almost surely, 2^387728008638 is an apocalyptic number.

387728008638 is an abundant number, since it is smaller than the sum of its proper divisors (421443487938).

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

387728008638 is a wasteful number, since it uses less digits than its factorization.

387728008638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809623279.

The product of its (nonzero) digits is 21676032, while the sum is 60.

The spelling of 387728008638 in words is "three hundred eighty-seven billion, seven hundred twenty-eight million, eight thousand, six hundred thirty-eight".