3938475720 has 32 divisors (see below), whose sum is σ = 11815427520. Its totient is φ = 1050260160.

The previous prime is 3938475713. The next prime is 3938475721. The reversal of 3938475720 is 275748393.

It is a self number, because there is not a number n which added to its sum of digits gives 3938475720.

It is not an unprimeable number, because it can be changed into a prime (3938475721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16410196 + ... + 16410435.

It is an arithmetic number, because the mean of its divisors is an integer number (369232110).

Almost surely, 2^3938475720 is an apocalyptic number.

3938475720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3938475720 is an abundant number, since it is smaller than the sum of its proper divisors (7876951800).

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

3938475720 is a wasteful number, since it uses less digits than its factorization.

3938475720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32820645 (or 32820641 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 48.

The square root of 3938475720 is about 62757.2762315255. The cubic root of 3938475720 is about 1579.2203224699.

The spelling of 3938475720 in words is "three billion, nine hundred thirty-eight million, four hundred seventy-five thousand, seven hundred twenty".