3128156842 has 8 divisors (see below), whose sum is σ = 4968249156. Its totient is φ = 1472073792.

The previous prime is 3128156839. The next prime is 3128156861. The reversal of 3128156842 is 2486518213.

It can be written as a sum of positive squares in 2 ways, for example, as 2944256121 + 183900721 = 54261^2 + 13561^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 3128156795 and 3128156804.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46002273 + ... + 46002340.

Almost surely, 2^3128156842 is an apocalyptic number.

3128156842 is a deficient number, since it is larger than the sum of its proper divisors (1840092314).

3128156842 is a wasteful number, since it uses less digits than its factorization.

3128156842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92004632.

The product of its digits is 92160, while the sum is 40.

The square root of 3128156842 is about 55929.9279634794. The cubic root of 3128156842 is about 1462.5010054002.

The spelling of 3128156842 in words is "three billion, one hundred twenty-eight million, one hundred fifty-six thousand, eight hundred forty-two".