3128900650 has 48 divisors (see below), whose sum is σ = 5974492608. Its totient is φ = 1218416000.

The previous prime is 3128900647. The next prime is 3128900653. The reversal of 3128900650 is 560098213.

It is an interprime number because it is at equal distance from previous prime (3128900647) and next prime (3128900653).

It is not an unprimeable number, because it can be changed into a prime (3128900653) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 1152795 + ... + 1155505.

It is an arithmetic number, because the mean of its divisors is an integer number (124468596).

Almost surely, 2^3128900650 is an apocalyptic number.

3128900650 is a deficient number, since it is larger than the sum of its proper divisors (2845591958).

3128900650 is a wasteful number, since it uses less digits than its factorization.

3128900650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327 (or 3322 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 3128900650 is about 55936.5770314917. The cubic root of 3128900650 is about 1462.6169132435.

Adding to 3128900650 its reverse (560098213), we get a palindrome (3688998863).

The spelling of 3128900650 in words is "three billion, one hundred twenty-eight million, nine hundred thousand, six hundred fifty".