28024820 has 24 divisors (see below), whose sum is σ = 60222624. Its totient is φ = 10948896.

The previous prime is 28024819. The next prime is 28024849. The reversal of 28024820 is 2842082.

It is a self number, because there is not a number n which added to its sum of digits gives 28024820.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15434 + ... + 17153.

It is an arithmetic number, because the mean of its divisors is an integer number (2509276).

Almost surely, 2^28024820 is an apocalyptic number.

28024820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28024820 is an abundant number, since it is smaller than the sum of its proper divisors (32197804).

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

28024820 is a wasteful number, since it uses less digits than its factorization.

28024820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32639 (or 32637 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 28024820 is about 5293.8473721859. The cubic root of 28024820 is about 303.7485946635.

The spelling of 28024820 in words is "twenty-eight million, twenty-four thousand, eight hundred twenty".