842661328 has 10 divisors (see below), whose sum is σ = 1632656354. Its totient is φ = 421330656.

The previous prime is 842661319. The next prime is 842661329. The reversal of 842661328 is 823166248.

It can be written as a sum of positive squares in only one way, i.e., 823230864 + 19430464 = 28692^2 + 4408^2 .

It is a super-2 number, since 2×842661328² = 1420156227413447168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842661329) 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 as a sum of consecutive naturals, namely, 26333151 + ... + 26333182.

Almost surely, 2^842661328 is an apocalyptic number.

It is an amenable number.

842661328 is a deficient number, since it is larger than the sum of its proper divisors (789995026).

842661328 is a wasteful number, since it uses less digits than its factorization.

842661328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52666341 (or 52666335 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 842661328 is about 29028.6294543852. The cubic root of 842661328 is about 944.5342004211.

The spelling of 842661328 in words is "eight hundred forty-two million, six hundred sixty-one thousand, three hundred twenty-eight".