42820530 has 64 divisors (see below), whose sum is σ = 107775360. Its totient is φ = 10873856.

The previous prime is 42820513. The next prime is 42820537. The reversal of 42820530 is 3502824.

42820530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 42820530.

It is not an unprimeable number, because it can be changed into a prime (42820537) 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 31 ways as a sum of consecutive naturals, for example, 71914 + ... + 72506.

It is an arithmetic number, because the mean of its divisors is an integer number (1683990).

Almost surely, 2^42820530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42820530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53887680).

42820530 is an abundant number, since it is smaller than the sum of its proper divisors (64954830).

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

42820530 is a wasteful number, since it uses less digits than its factorization.

42820530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 42820530 is about 6543.7397564390. The cubic root of 42820530 is about 349.8517195015.

The spelling of 42820530 in words is "forty-two million, eight hundred twenty thousand, five hundred thirty".