42771688 has 16 divisors (see below), whose sum is σ = 80283780. Its totient is φ = 21362688.

The previous prime is 42771683. The next prime is 42771719. The reversal of 42771688 is 88617724.

It can be written as a sum of positive squares in 2 ways, for example, as 42745444 + 26244 = 6538^2 + 162^2 .

It is not an unprimeable number, because it can be changed into a prime (42771683) 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, 6906 + ... + 11542.

Almost surely, 2^42771688 is an apocalyptic number.

It is an amenable number.

42771688 is a deficient number, since it is larger than the sum of its proper divisors (37512092).

42771688 is a wasteful number, since it uses less digits than its factorization.

42771688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5796 (or 5792 counting only the distinct ones).

The product of its digits is 150528, while the sum is 43.

The square root of 42771688 is about 6540.0067278253. The cubic root of 42771688 is about 349.7186528115.

The spelling of 42771688 in words is "forty-two million, seven hundred seventy-one thousand, six hundred eighty-eight".