1938823680 has 160 divisors (see below), whose sum is σ = 6366628224. Its totient is φ = 502972416.

The previous prime is 1938823651. The next prime is 1938823723. The reversal of 1938823680 is 863288391.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 280749 + ... + 287571.

Almost surely, 2^1938823680 is an apocalyptic number.

1938823680 is a gapful number since it is divisible by the number (10) 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 1938823680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3183314112).

1938823680 is an abundant number, since it is smaller than the sum of its proper divisors (4427804544).

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

1938823680 is an equidigital number, since it uses as much as digits as its factorization.

1938823680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6886 (or 6870 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 1938823680 is about 44032.0755813305. The cubic root of 1938823680 is about 1246.9415746640.

The spelling of 1938823680 in words is "one billion, nine hundred thirty-eight million, eight hundred twenty-three thousand, six hundred eighty".