28484578 has 8 divisors (see below), whose sum is σ = 42930000. Its totient is φ = 14174580.

The previous prime is 28484569. The next prime is 28484579. The reversal of 28484578 is 87548482.

It is a happy number.

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

It is a super-2 number, since 2×28484578² = 1622742367676168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28484579) 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 3 ways as a sum of consecutive naturals, for example, 33328 + ... + 34171.

It is an arithmetic number, because the mean of its divisors is an integer number (5366250).

Almost surely, 2^28484578 is an apocalyptic number.

28484578 is a deficient number, since it is larger than the sum of its proper divisors (14445422).

28484578 is a wasteful number, since it uses less digits than its factorization.

28484578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67712.

The product of its digits is 573440, while the sum is 46.

The square root of 28484578 is about 5337.0945279243. The cubic root of 28484578 is about 305.4006309182.

The spelling of 28484578 in words is "twenty-eight million, four hundred eighty-four thousand, five hundred seventy-eight".