28452880 has 40 divisors (see below), whose sum is σ = 69638400. Its totient is φ = 10781568.

The previous prime is 28452871. The next prime is 28452887. The reversal of 28452880 is 8825482.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (28452887) 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, 7840 + ... + 10879.

It is an arithmetic number, because the mean of its divisors is an integer number (1740960).

Almost surely, 2^28452880 is an apocalyptic number.

28452880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28452880 is an abundant number, since it is smaller than the sum of its proper divisors (41185520).

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

28452880 is a wasteful number, since it uses less digits than its factorization.

28452880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18751 (or 18745 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 37.

The square root of 28452880 is about 5334.1241080425. The cubic root of 28452880 is about 305.2873043044.

The spelling of 28452880 in words is "twenty-eight million, four hundred fifty-two thousand, eight hundred eighty".