28491200 has 42 divisors (see below), whose sum is σ = 70110096. Its totient is φ = 11395840.

The previous prime is 28491193. The next prime is 28491223. The reversal of 28491200 is 219482.

It is a self number, because there is not a number n which added to its sum of digits gives 28491200.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 7304 + ... + 10503.

It is an arithmetic number, because the mean of its divisors is an integer number (1669288).

Almost surely, 2^28491200 is an apocalyptic number.

28491200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28491200 is an abundant number, since it is smaller than the sum of its proper divisors (41618896).

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

28491200 is a wasteful number, since it uses less digits than its factorization.

28491200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17829 (or 17814 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 28491200 is about 5337.7148668695. The cubic root of 28491200 is about 305.4242952590.

The spelling of 28491200 in words is "twenty-eight million, four hundred ninety-one thousand, two hundred".