42782556 has 12 divisors (see below), whose sum is σ = 99825992. Its totient is φ = 14260848.

The previous prime is 42782543. The next prime is 42782563. The reversal of 42782556 is 65528724.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 1782595 + ... + 1782618.

Almost surely, 2^42782556 is an apocalyptic number.

It is an amenable number.

42782556 is an abundant number, since it is smaller than the sum of its proper divisors (57043436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42782556 is a wasteful number, since it uses less digits than its factorization.

42782556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565220 (or 3565218 counting only the distinct ones).

The product of its digits is 134400, while the sum is 39.

The square root of 42782556 is about 6540.8375610468. The cubic root of 42782556 is about 349.7482706937.

The spelling of 42782556 in words is "forty-two million, seven hundred eighty-two thousand, five hundred fifty-six".