42816684 has 12 divisors (see below), whose sum is σ = 99905624. Its totient is φ = 14272224.

The previous prime is 42816679. The next prime is 42816701. The reversal of 42816684 is 48661824.

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

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 1784017 + ... + 1784040.

Almost surely, 2^42816684 is an apocalyptic number.

It is an amenable number.

42816684 is an abundant number, since it is smaller than the sum of its proper divisors (57088940).

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

42816684 is a wasteful number, since it uses less digits than its factorization.

42816684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568064 (or 3568062 counting only the distinct ones).

The product of its digits is 73728, while the sum is 39.

The square root of 42816684 is about 6543.4458811852. The cubic root of 42816684 is about 349.8412450087.

The spelling of 42816684 in words is "forty-two million, eight hundred sixteen thousand, six hundred eighty-four".