28894645 has 32 divisors (see below), whose sum is σ = 40158720. Its totient is φ = 19768320.

The previous prime is 28894639. The next prime is 28894661. The reversal of 28894645 is 54649882.

It is not a de Polignac number, because 28894645 - 2³ = 28894637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28894595 and 28894604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87130 + ... + 87460.

It is an arithmetic number, because the mean of its divisors is an integer number (1254960).

Almost surely, 2^28894645 is an apocalyptic number.

It is an amenable number.

28894645 is a deficient number, since it is larger than the sum of its proper divisors (11264075).

28894645 is a wasteful number, since it uses less digits than its factorization.

28894645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its digits is 552960, while the sum is 46.

The square root of 28894645 is about 5375.3739404808. The cubic root of 28894645 is about 306.8591806076.

The spelling of 28894645 in words is "twenty-eight million, eight hundred ninety-four thousand, six hundred forty-five".