38394690840 has 192 divisors, whose sum is σ = 136229277600. Its totient is φ = 9300787200.

The previous prime is 38394690827. The next prime is 38394690863. The reversal of 38394690840 is 4809649383.

It is a happy number.

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, 6891576 + ... + 6897144.

Almost surely, 2^38394690840 is an apocalyptic number.

38394690840 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 38394690840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68114638800).

38394690840 is an abundant number, since it is smaller than the sum of its proper divisors (97834586760).

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

38394690840 is a wasteful number, since it uses less digits than its factorization.

38394690840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7338 (or 7331 counting only the distinct ones).

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

The spelling of 38394690840 in words is "thirty-eight billion, three hundred ninety-four million, six hundred ninety thousand, eight hundred forty".