42821828 has 24 divisors (see below), whose sum is σ = 86450112. Its totient is φ = 18179424.

The previous prime is 42821809. The next prime is 42821833. The reversal of 42821828 is 82812824.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4151 + ... + 10142.

It is an arithmetic number, because the mean of its divisors is an integer number (3602088).

Almost surely, 2^42821828 is an apocalyptic number.

It is an amenable number.

42821828 is an abundant number, since it is smaller than the sum of its proper divisors (43628284).

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

42821828 is a wasteful number, since it uses less digits than its factorization.

42821828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14411 (or 14409 counting only the distinct ones).

The product of its digits is 16384, while the sum is 35.

The square root of 42821828 is about 6543.8389344482. The cubic root of 42821828 is about 349.8552544332.

The spelling of 42821828 in words is "forty-two million, eight hundred twenty-one thousand, eight hundred twenty-eight".