4129950728 has 12 divisors (see below), whose sum is σ = 7743998445. Its totient is φ = 2064884480.

The previous prime is 4129950683. The next prime is 4129950731. The reversal of 4129950728 is 8270599214.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 4083465604 + 46485124 = 63902^2 + 6818^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=45442.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 170408 + ... + 193128.

Almost surely, 2^4129950728 is an apocalyptic number.

It is an amenable number.

4129950728 is a deficient number, since it is larger than the sum of its proper divisors (3614047717).

4129950728 is an frugal number, since it uses more digits than its factorization.

4129950728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45448 (or 22723 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 4129950728 is about 64264.6927013582. The cubic root of 4129950728 is about 1604.4085097036.

The spelling of 4129950728 in words is "four billion, one hundred twenty-nine million, nine hundred fifty thousand, seven hundred twenty-eight".