3128612357 has 16 divisors (see below), whose sum is σ = 3585626352. Its totient is φ = 2704235520.

The previous prime is 3128612353. The next prime is 3128612363. The reversal of 3128612357 is 7532168213.

It is a Cunningham number, because it is equal to 55934²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 28238596 + 3100373761 = 5314^2 + 55681^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128612357 - 2² = 3128612353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3128612357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3128612353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7607 + ... + 79467.

It is an arithmetic number, because the mean of its divisors is an integer number (224101647).

Almost surely, 2^3128612357 is an apocalyptic number.

It is an amenable number.

3128612357 is a deficient number, since it is larger than the sum of its proper divisors (457013995).

3128612357 is a wasteful number, since it uses less digits than its factorization.

3128612357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72088.

The product of its digits is 60480, while the sum is 38.

The square root of 3128612357 is about 55934.0000089391. Note that the first 5 decimals coincide. The cubic root of 3128612357 is about 1462.5719906316.

The spelling of 3128612357 in words is "three billion, one hundred twenty-eight million, six hundred twelve thousand, three hundred fifty-seven".