42806844 has 36 divisors (see below), whose sum is σ = 110726616. Its totient is φ = 13936608.

The previous prime is 42806837. The next prime is 42806849. The reversal of 42806844 is 44860824.

42806844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 42806799 and 42806808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42806849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12279 + ... + 15374.

Almost surely, 2^42806844 is an apocalyptic number.

It is an amenable number.

42806844 is an abundant number, since it is smaller than the sum of its proper divisors (67919772).

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

42806844 is a wasteful number, since it uses less digits than its factorization.

42806844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27706 (or 27701 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 42806844 is about 6542.6939405722. The cubic root of 42806844 is about 349.8144431387.

The spelling of 42806844 in words is "forty-two million, eight hundred six thousand, eight hundred forty-four".