3920439730 has 16 divisors (see below), whose sum is σ = 7059475800. Its totient is φ = 1567579392.

The previous prime is 3920439671. The next prime is 3920439763. The reversal of 3920439730 is 379340293.

It can be written as a sum of positive squares in 4 ways, for example, as 2396396209 + 1524043521 = 48953^2 + 39039^2 .

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, 46455 + ... + 99994.

Almost surely, 2^3920439730 is an apocalyptic number.

3920439730 is a deficient number, since it is larger than the sum of its proper divisors (3139036070).

3920439730 is a wasteful number, since it uses less digits than its factorization.

3920439730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149133.

The product of its (nonzero) digits is 122472, while the sum is 40.

The square root of 3920439730 is about 62613.4149364176. The cubic root of 3920439730 is about 1576.8059881524.

The spelling of 3920439730 in words is "three billion, nine hundred twenty million, four hundred thirty-nine thousand, seven hundred thirty".