38634891660 has 72 divisors (see below), whose sum is σ = 119403713520. Its totient is φ = 10108245888.

The previous prime is 38634891641. The next prime is 38634891667. The reversal of 38634891660 is 6619843683.

38634891660 is a `hidden beast` number, since 38 + 63 + 489 + 16 + 60 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 38634891597 and 38634891606.

It is not an unprimeable number, because it can be changed into a prime (38634891667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2015350 + ... + 2034429.

It is an arithmetic number, because the mean of its divisors is an integer number (1658384910).

Almost surely, 2^38634891660 is an apocalyptic number.

38634891660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38634891660 is an abundant number, since it is smaller than the sum of its proper divisors (80768821860).

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

38634891660 is a wasteful number, since it uses less digits than its factorization.

38634891660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049847 (or 4049842 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 38634891660 in words is "thirty-eight billion, six hundred thirty-four million, eight hundred ninety-one thousand, six hundred sixty".