28303080 has 64 divisors (see below), whose sum is σ = 91445760. Its totient is φ = 6966528.

The previous prime is 28303057. The next prime is 28303081. The reversal of 28303080 is 8030382.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 28303080.

It is not an unprimeable number, because it can be changed into a prime (28303081) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7512 + ... + 10631.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^28303080 is an apocalyptic number.

28303080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28303080 is an abundant number, since it is smaller than the sum of its proper divisors (63142680).

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

28303080 is a wasteful number, since it uses less digits than its factorization.

28303080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18170 (or 18166 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 28303080 is about 5320.0639093906. The cubic root of 28303080 is about 304.7505978723.

The spelling of 28303080 in words is "twenty-eight million, three hundred three thousand, eighty".