42840380 has 24 divisors (see below), whose sum is σ = 98143920. Its totient is φ = 15578240.

The previous prime is 42840373. The next prime is 42840389. The reversal of 42840380 is 8304824.

42840380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42840389) 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 7 ways as a sum of consecutive naturals, for example, 97145 + ... + 97584.

It is an arithmetic number, because the mean of its divisors is an integer number (4089330).

Almost surely, 2^42840380 is an apocalyptic number.

It is an amenable number.

42840380 is an abundant number, since it is smaller than the sum of its proper divisors (55303540).

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

42840380 is a wasteful number, since it uses less digits than its factorization.

42840380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194749 (or 194747 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 42840380 is about 6545.2562975028. The cubic root of 42840380 is about 349.9057705515.

The spelling of 42840380 in words is "forty-two million, eight hundred forty thousand, three hundred eighty".