28254930 has 32 divisors (see below), whose sum is σ = 73977408. Its totient is φ = 6849600.

The previous prime is 28254907. The next prime is 28254931. The reversal of 28254930 is 3945282.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28254891 and 28254900.

It is not an unprimeable number, because it can be changed into a prime (28254931) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 42481 + ... + 43140.

It is an arithmetic number, because the mean of its divisors is an integer number (2311794).

Almost surely, 2^28254930 is an apocalyptic number.

28254930 is an abundant number, since it is smaller than the sum of its proper divisors (45722478).

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

28254930 is a wasteful number, since it uses less digits than its factorization.

28254930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85642.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 28254930 is about 5315.5366615235. The cubic root of 28254930 is about 304.5776830012.

The spelling of 28254930 in words is "twenty-eight million, two hundred fifty-four thousand, nine hundred thirty".