28304454 has 8 divisors (see below), whose sum is σ = 56608920. Its totient is φ = 9434816.

The previous prime is 28304453. The next prime is 28304459. The reversal of 28304454 is 45440382.

It is a sphenic number, since it is the product of 3 distinct primes.

28304454 is an admirable number.

It is a super-4 number, since 4×28304454⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28304453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2358699 + ... + 2358710.

It is an arithmetic number, because the mean of its divisors is an integer number (7076115).

Almost surely, 2^28304454 is an apocalyptic number.

28304454 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28304454 is a wasteful number, since it uses less digits than its factorization.

28304454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717414.

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 28304454 is about 5320.1930416104. The cubic root of 28304454 is about 304.7555292619.

The spelling of 28304454 in words is "twenty-eight million, three hundred four thousand, four hundred fifty-four".