3928429850 has 12 divisors (see below), whose sum is σ = 7306879614. Its totient is φ = 1571371920.

The previous prime is 3928429793. The next prime is 3928429859. The reversal of 3928429850 is 589248293.

It can be written as a sum of positive squares in 3 ways, for example, as 2332986601 + 1595443249 = 48301^2 + 39943^2 .

It is a super-2 number, since 2×3928429850² = 30865122172742045000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 78568597 = 3928429850 / (3 + 9 + 2 + 8 + 4 + 2 + 9 + 8 + 5 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3928429859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39284249 + ... + 39284348.

Almost surely, 2^3928429850 is an apocalyptic number.

3928429850 is a deficient number, since it is larger than the sum of its proper divisors (3378449764).

3928429850 is a wasteful number, since it uses less digits than its factorization.

3928429850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78568609 (or 78568604 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 3928429850 is about 62677.1876363322. The cubic root of 3928429850 is about 1577.8764734800.

The spelling of 3928429850 in words is "three billion, nine hundred twenty-eight million, four hundred twenty-nine thousand, eight hundred fifty".