42209828 has 24 divisors (see below), whose sum is σ = 76181280. Its totient is φ = 20450880.

The previous prime is 42209809. The next prime is 42209831. The reversal of 42209828 is 82890224.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25943 + ... + 27521.

It is an arithmetic number, because the mean of its divisors is an integer number (3174220).

Almost surely, 2^42209828 is an apocalyptic number.

It is an amenable number.

42209828 is a deficient number, since it is larger than the sum of its proper divisors (33971452).

42209828 is a wasteful number, since it uses less digits than its factorization.

42209828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1787 (or 1785 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 42209828 is about 6496.9091112621. The cubic root of 42209828 is about 348.1805664423.

The spelling of 42209828 in words is "forty-two million, two hundred nine thousand, eight hundred twenty-eight".