28538985 has 32 divisors (see below), whose sum is σ = 47099520. Its totient is φ = 14750208.

The previous prime is 28538977. The next prime is 28538999. The reversal of 28538985 is 58983582.

It is not a de Polignac number, because 28538985 - 2³ = 28538977 is a prime.

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, 73171 + ... + 73559.

It is an arithmetic number, because the mean of its divisors is an integer number (1471860).

Almost surely, 2^28538985 is an apocalyptic number.

It is an amenable number.

28538985 is a deficient number, since it is larger than the sum of its proper divisors (18560535).

28538985 is a wasteful number, since it uses less digits than its factorization.

28538985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537.

The product of its digits is 691200, while the sum is 48.

The square root of 28538985 is about 5342.1891580138. The cubic root of 28538985 is about 305.5949508557.

The spelling of 28538985 in words is "twenty-eight million, five hundred thirty-eight thousand, nine hundred eighty-five".