28878546 has 32 divisors (see below), whose sum is σ = 63134208. Its totient is φ = 8766720.

The previous prime is 28878533. The next prime is 28878571. The reversal of 28878546 is 64587882.

It is a junction number, because it is equal to n+sod(n) for n = 28878495 and 28878504.

It is an unprimeable number.

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, 1405 + ... + 7728.

It is an arithmetic number, because the mean of its divisors is an integer number (1972944).

Almost surely, 2^28878546 is an apocalyptic number.

28878546 is an abundant number, since it is smaller than the sum of its proper divisors (34255662).

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

28878546 is a wasteful number, since it uses less digits than its factorization.

28878546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9186.

The product of its digits is 860160, while the sum is 48.

The square root of 28878546 is about 5373.8762546229. The cubic root of 28878546 is about 306.8021799221.

The spelling of 28878546 in words is "twenty-eight million, eight hundred seventy-eight thousand, five hundred forty-six".