1938508020 has 72 divisors (see below), whose sum is σ = 5976570600. Its totient is φ = 508458240.

The previous prime is 1938508007. The next prime is 1938508051. The reversal of 1938508020 is 208058391.

It can be written as a sum of positive squares in 4 ways, for example, as 571536 + 1937936484 = 756^2 + 44022^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77295 + ... + 99254.

It is an arithmetic number, because the mean of its divisors is an integer number (83007925).

Almost surely, 2^1938508020 is an apocalyptic number.

1938508020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1938508020 is an abundant number, since it is smaller than the sum of its proper divisors (4038062580).

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

1938508020 is a wasteful number, since it uses less digits than its factorization.

1938508020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176625 (or 176620 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1938508020 is about 44028.4910029858. The cubic root of 1938508020 is about 1246.8738994469.

The spelling of 1938508020 in words is "one billion, nine hundred thirty-eight million, five hundred eight thousand, twenty".