42930820 has 24 divisors (see below), whose sum is σ = 90287064. Its totient is φ = 17147136.

The previous prime is 42930809. The next prime is 42930827. The reversal of 42930820 is 2803924.

It can be written as a sum of positive squares in 4 ways, for example, as 3013696 + 39917124 = 1736^2 + 6318^2 .

It is not an unprimeable number, because it can be changed into a prime (42930827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18864 + ... + 21016.

It is an arithmetic number, because the mean of its divisors is an integer number (3761961).

Almost surely, 2^42930820 is an apocalyptic number.

It is an amenable number.

42930820 is an abundant number, since it is smaller than the sum of its proper divisors (47356244).

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

42930820 is a wasteful number, since it uses less digits than its factorization.

42930820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159 (or 3157 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 42930820 is about 6552.1614754217. The cubic root of 42930820 is about 350.1518252872.

The spelling of 42930820 in words is "forty-two million, nine hundred thirty thousand, eight hundred twenty".