3128372945 has 8 divisors (see below), whose sum is σ = 3917267136. Its totient is φ = 2393885296.

The previous prime is 3128372909. The next prime is 3128372953. The reversal of 3128372945 is 5492738213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3128372945 - 2⁶ = 3128372881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3128372896 and 3128372905.

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 in 7 ways as a sum of consecutive naturals, for example, 13601507 + ... + 13601736.

It is an arithmetic number, because the mean of its divisors is an integer number (489658392).

Almost surely, 2^3128372945 is an apocalyptic number.

It is an amenable number.

3128372945 is a deficient number, since it is larger than the sum of its proper divisors (788894191).

3128372945 is a wasteful number, since it uses less digits than its factorization.

3128372945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27203271.

The product of its digits is 362880, while the sum is 44.

The square root of 3128372945 is about 55931.8598385571. The cubic root of 3128372945 is about 1462.5346826947.

The spelling of 3128372945 in words is "three billion, one hundred twenty-eight million, three hundred seventy-two thousand, nine hundred forty-five".