42816680 has 16 divisors (see below), whose sum is σ = 96337620. Its totient is φ = 17126656.

The previous prime is 42816679. The next prime is 42816701. The reversal of 42816680 is 8661824.

It can be written as a sum of positive squares in 2 ways, for example, as 41705764 + 1110916 = 6458^2 + 1054^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42816680.

It is an unprimeable number.

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, 535169 + ... + 535248.

Almost surely, 2^42816680 is an apocalyptic number.

42816680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42816680 is an abundant number, since it is smaller than the sum of its proper divisors (53520940).

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

42816680 is a wasteful number, since it uses less digits than its factorization.

42816680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070428 (or 1070424 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 42816680 is about 6543.4455755359. The cubic root of 42816680 is about 349.8412341145.

The spelling of 42816680 in words is "forty-two million, eight hundred sixteen thousand, six hundred eighty".