3928393990 has 32 divisors (see below), whose sum is σ = 7171195680. Its totient is φ = 1549248000.

The previous prime is 3928393919. The next prime is 3928393993. The reversal of 3928393990 is 993938293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928393993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235341 + ... + 251479.

It is an arithmetic number, because the mean of its divisors is an integer number (224099865).

Almost surely, 2^3928393990 is an apocalyptic number.

3928393990 is a deficient number, since it is larger than the sum of its proper divisors (3242801690).

3928393990 is a wasteful number, since it uses less digits than its factorization.

3928393990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16488.

The product of its (nonzero) digits is 2834352, while the sum is 55.

The square root of 3928393990 is about 62676.9015666856. The cubic root of 3928393990 is about 1577.8716723402.

The spelling of 3928393990 in words is "three billion, nine hundred twenty-eight million, three hundred ninety-three thousand, nine hundred ninety".