3156121328 has 20 divisors (see below), whose sum is σ = 6118641120. Its totient is φ = 1577117184.

The previous prime is 3156121321. The next prime is 3156121343. The reversal of 3156121328 is 8231216513.

It is a super-2 number, since 2×3156121328² = 19922203674112967168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3156121294 and 3156121303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3156121321) 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 3 ways as a sum of consecutive naturals, for example, 30968 + ... + 85271.

It is an arithmetic number, because the mean of its divisors is an integer number (305932056).

Almost surely, 2^3156121328 is an apocalyptic number.

It is an amenable number.

3156121328 is a deficient number, since it is larger than the sum of its proper divisors (2962519792).

3156121328 is a wasteful number, since it uses less digits than its factorization.

3156121328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117944 (or 117938 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 3156121328 is about 56179.3674581692. The cubic root of 3156121328 is about 1466.8461434175.

The spelling of 3156121328 in words is "three billion, one hundred fifty-six million, one hundred twenty-one thousand, three hundred twenty-eight".