38117680440 has 64 divisors (see below), whose sum is σ = 130689192960. Its totient is φ = 8712612480.

The previous prime is 38117680439. The next prime is 38117680451. The reversal of 38117680440 is 4408671183.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 38117680392 and 38117680401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22688256 + ... + 22689935.

It is an arithmetic number, because the mean of its divisors is an integer number (2042018640).

Almost surely, 2^38117680440 is an apocalyptic number.

38117680440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38117680440 is an abundant number, since it is smaller than the sum of its proper divisors (92571512520).

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

38117680440 is a wasteful number, since it uses less digits than its factorization.

38117680440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45378212 (or 45378208 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 38117680440 in words is "thirty-eight billion, one hundred seventeen million, six hundred eighty thousand, four hundred forty".