38986667640 has 384 divisors, whose sum is σ = 135215308800. Its totient is φ = 9724769280.

The previous prime is 38986667591. The next prime is 38986667651. The reversal of 38986667640 is 4676668983.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 108597781 + ... + 108598139.

It is an arithmetic number, because the mean of its divisors is an integer number (352123200).

Almost surely, 2^38986667640 is an apocalyptic number.

38986667640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38986667640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67607654400).

38986667640 is an abundant number, since it is smaller than the sum of its proper divisors (96228641160).

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

38986667640 is a wasteful number, since it uses less digits than its factorization.

38986667640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 38986667640 in words is "thirty-eight billion, nine hundred eighty-six million, six hundred sixty-seven thousand, six hundred forty".