42985530 has 144 divisors (see below), whose sum is σ = 133840512. Its totient is φ = 9374400.

The previous prime is 42985529. The next prime is 42985549. The reversal of 42985530 is 3558924.

42985530 is a `hidden beast` number, since 42 + 9 + 85 + 530 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 605395 + ... + 605465.

It is an arithmetic number, because the mean of its divisors is an integer number (929448).

Almost surely, 2^42985530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42985530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66920256).

42985530 is an abundant number, since it is smaller than the sum of its proper divisors (90854982).

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

42985530 is a wasteful number, since it uses less digits than its factorization.

42985530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 42985530 is about 6556.3351043094. The cubic root of 42985530 is about 350.3005038236.

The spelling of 42985530 in words is "forty-two million, nine hundred eighty-five thousand, five hundred thirty".