42128836 has 12 divisors (see below), whose sum is σ = 74134060. Its totient is φ = 20947680.

The previous prime is 42128831. The next prime is 42128869. The reversal of 42128836 is 63882124.

It can be written as a sum of positive squares in 2 ways, for example, as 1806336 + 40322500 = 1344^2 + 6350^2 .

It is not an unprimeable number, because it can be changed into a prime (42128831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28371 + ... + 29818.

Almost surely, 2^42128836 is an apocalyptic number.

It is an amenable number.

42128836 is a deficient number, since it is larger than the sum of its proper divisors (32005224).

42128836 is a wasteful number, since it uses less digits than its factorization.

42128836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58374 (or 58372 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 42128836 is about 6490.6730005447. The cubic root of 42128836 is about 347.9577281635.

The spelling of 42128836 in words is "forty-two million, one hundred twenty-eight thousand, eight hundred thirty-six".