38439463920 has 960 divisors, whose sum is σ = 155600040960. Its totient is φ = 7761346560.

The previous prime is 38439463919. The next prime is 38439464003. The reversal of 38439463920 is 2936493483.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 164976124 + ... + 164976356.

It is an arithmetic number, because the mean of its divisors is an integer number (162083376).

Almost surely, 2^38439463920 is an apocalyptic number.

38439463920 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 38439463920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77800020480).

38439463920 is an abundant number, since it is smaller than the sum of its proper divisors (117160577040).

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

38439463920 is a wasteful number, since it uses less digits than its factorization.

38439463920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 51.

The spelling of 38439463920 in words is "thirty-eight billion, four hundred thirty-nine million, four hundred sixty-three thousand, nine hundred twenty".