42985820 has 24 divisors (see below), whose sum is σ = 90632304. Its totient is φ = 17125376.

The previous prime is 42985799. The next prime is 42985849. The reversal of 42985820 is 2858924.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959 + ... + 9321.

It is an arithmetic number, because the mean of its divisors is an integer number (3776346).

Almost surely, 2^42985820 is an apocalyptic number.

It is an amenable number.

42985820 is an abundant number, since it is smaller than the sum of its proper divisors (47646484).

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

42985820 is a wasteful number, since it uses less digits than its factorization.

42985820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8629 (or 8627 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 42985820 is about 6556.3572202863. The cubic root of 42985820 is about 350.3012915842.

The spelling of 42985820 in words is "forty-two million, nine hundred eighty-five thousand, eight hundred twenty".