28328120 has 32 divisors (see below), whose sum is σ = 67489200. Its totient is φ = 10664448.

The previous prime is 28328117. The next prime is 28328123. The reversal of 28328120 is 2182382.

It is an interprime number because it is at equal distance from previous prime (28328117) and next prime (28328123).

It is a self number, because there is not a number n which added to its sum of digits gives 28328120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28328123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20150 + ... + 21509.

Almost surely, 2^28328120 is an apocalyptic number.

28328120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28328120 is an abundant number, since it is smaller than the sum of its proper divisors (39161080).

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

28328120 is a wasteful number, since it uses less digits than its factorization.

28328120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41687 (or 41683 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28328120 is about 5322.4167442995. The cubic root of 28328120 is about 304.8404432847.

The spelling of 28328120 in words is "twenty-eight million, three hundred twenty-eight thousand, one hundred twenty".