38018578640 has 240 divisors, whose sum is σ = 107662037760. Its totient is φ = 12425656320.

The previous prime is 38018578603. The next prime is 38018578657. The reversal of 38018578640 is 4687581083.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36874925 + ... + 36875955.

It is an arithmetic number, because the mean of its divisors is an integer number (448591824).

Almost surely, 2^38018578640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38018578640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53831018880).

38018578640 is an abundant number, since it is smaller than the sum of its proper divisors (69643459120).

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

38018578640 is a wasteful number, since it uses less digits than its factorization.

38018578640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490 (or 1477 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 38018578640 in words is "thirty-eight billion, eighteen million, five hundred seventy-eight thousand, six hundred forty".