3938939220 has 24 divisors (see below), whose sum is σ = 11029029984. Its totient is φ = 1050383776.

The previous prime is 3938939209. The next prime is 3938939233. The reversal of 3938939220 is 229398393.

It is a self number, because there is not a number n which added to its sum of digits gives 3938939220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32824434 + ... + 32824553.

It is an arithmetic number, because the mean of its divisors is an integer number (459542916).

Almost surely, 2^3938939220 is an apocalyptic number.

3938939220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3938939220 is an abundant number, since it is smaller than the sum of its proper divisors (7090090764).

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

3938939220 is a wasteful number, since it uses less digits than its factorization.

3938939220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65648999 (or 65648997 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 48.

The square root of 3938939220 is about 62760.9689217749. The cubic root of 3938939220 is about 1579.2822702859.

The spelling of 3938939220 in words is "three billion, nine hundred thirty-eight million, nine hundred thirty-nine thousand, two hundred twenty".