3938127720 has 128 divisors (see below), whose sum is σ = 12484368000. Its totient is φ = 991042560.

The previous prime is 3938127709. The next prime is 3938127727. The reversal of 3938127720 is 277218393.

It is not an unprimeable number, because it can be changed into a prime (3938127727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 610110 + ... + 616530.

It is an arithmetic number, because the mean of its divisors is an integer number (97534125).

Almost surely, 2^3938127720 is an apocalyptic number.

3938127720 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 3938127720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6242184000).

3938127720 is an abundant number, since it is smaller than the sum of its proper divisors (8546240280).

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

3938127720 is a wasteful number, since it uses less digits than its factorization.

3938127720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6723 (or 6719 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 3938127720 is about 62754.5035834083. The cubic root of 3938127720 is about 1579.1738082939.

The spelling of 3938127720 in words is "three billion, nine hundred thirty-eight million, one hundred twenty-seven thousand, seven hundred twenty".