3128472506 has 4 divisors (see below), whose sum is σ = 4692708762. Its totient is φ = 1564236252.

The previous prime is 3128472449. The next prime is 3128472517. The reversal of 3128472506 is 6052748213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3126487225 + 1985281 = 55915^2 + 1409^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3128472506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782118125 + ... + 782118128.

Almost surely, 2^3128472506 is an apocalyptic number.

3128472506 is a deficient number, since it is larger than the sum of its proper divisors (1564236256).

3128472506 is a wasteful number, since it uses less digits than its factorization.

3128472506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564236255.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 3128472506 is about 55932.7498519427. The cubic root of 3128472506 is about 1462.5501976683.

The spelling of 3128472506 in words is "three billion, one hundred twenty-eight million, four hundred seventy-two thousand, five hundred six".