3128512849 has 24 divisors (see below), whose sum is σ = 4179103200. Its totient is φ = 2309489280.

The previous prime is 3128512843. The next prime is 3128512861. The reversal of 3128512849 is 9482158213.

3128512849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3128512849 - 2⁵ = 3128512817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3128512843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142504 + ... + 162985.

It is an arithmetic number, because the mean of its divisors is an integer number (174129300).

Almost surely, 2^3128512849 is an apocalyptic number.

It is an amenable number.

3128512849 is a deficient number, since it is larger than the sum of its proper divisors (1050590351).

3128512849 is a wasteful number, since it uses less digits than its factorization.

3128512849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305533 (or 305526 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 3128512849 is about 55933.1104892263. The cubic root of 3128512849 is about 1462.5564843794.

It can be divided in two parts, 3128512 and 849, that added together give a square (3129361 = 1769²).

The spelling of 3128512849 in words is "three billion, one hundred twenty-eight million, five hundred twelve thousand, eight hundred forty-nine".