42294820 has 12 divisors (see below), whose sum is σ = 88819164. Its totient is φ = 16917920.

The previous prime is 42294809. The next prime is 42294823. The reversal of 42294820 is 2849224.

It can be written as a sum of positive squares in 2 ways, for example, as 33246756 + 9048064 = 5766^2 + 3008^2 .

It is not an unprimeable number, because it can be changed into a prime (42294823) by changing a digit.

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, 1057351 + ... + 1057390.

It is an arithmetic number, because the mean of its divisors is an integer number (7401597).

Almost surely, 2^42294820 is an apocalyptic number.

It is an amenable number.

42294820 is an abundant number, since it is smaller than the sum of its proper divisors (46524344).

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

42294820 is a wasteful number, since it uses less digits than its factorization.

42294820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114750 (or 2114748 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 42294820 is about 6503.4467784399. The cubic root of 42294820 is about 348.4141038605.

The spelling of 42294820 in words is "forty-two million, two hundred ninety-four thousand, eight hundred twenty".