28124020 has 24 divisors (see below), whose sum is σ = 59429664. Its totient is φ = 11179296.

The previous prime is 28124017. The next prime is 28124029. The reversal of 28124020 is 2042182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28124029) 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, 1054 + ... + 7573.

It is an arithmetic number, because the mean of its divisors is an integer number (2476236).

Almost surely, 2^28124020 is an apocalyptic number.

28124020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28124020 is an abundant number, since it is smaller than the sum of its proper divisors (31305644).

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

28124020 is a wasteful number, since it uses less digits than its factorization.

28124020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8799 (or 8797 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 28124020 is about 5303.2084628082. The cubic root of 28124020 is about 304.1065675552.

The spelling of 28124020 in words is "twenty-eight million, one hundred twenty-four thousand, twenty".