28910304 has 48 divisors (see below), whose sum is σ = 84324240. Its totient is φ = 9636480.

The previous prime is 28910293. The next prime is 28910317. The reversal of 28910304 is 40301982.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15867 + ... + 17594.

It is an arithmetic number, because the mean of its divisors is an integer number (1756755).

Almost surely, 2^28910304 is an apocalyptic number.

28910304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28910304 is an abundant number, since it is smaller than the sum of its proper divisors (55413936).

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

28910304 is a wasteful number, since it uses less digits than its factorization.

28910304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33480 (or 33466 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28910304 is about 5376.8302930258. The cubic root of 28910304 is about 306.9146031049.

The spelling of 28910304 in words is "twenty-eight million, nine hundred ten thousand, three hundred four".