42806872 has 16 divisors (see below), whose sum is σ = 81579600. Its totient is φ = 21052320.

The previous prime is 42806849. The next prime is 42806873. The reversal of 42806872 is 27860824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42806873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43372 + ... + 44347.

It is an arithmetic number, because the mean of its divisors is an integer number (5098725).

Almost surely, 2^42806872 is an apocalyptic number.

It is an amenable number.

42806872 is a deficient number, since it is larger than the sum of its proper divisors (38772728).

42806872 is a wasteful number, since it uses less digits than its factorization.

42806872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87786 (or 87782 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 42806872 is about 6542.6960803632. The cubic root of 42806872 is about 349.8145194100.

The spelling of 42806872 in words is "forty-two million, eight hundred six thousand, eight hundred seventy-two".