28688485 has 32 divisors (see below), whose sum is σ = 41121792. Its totient is φ = 18800640.

The previous prime is 28688477. The next prime is 28688497. The reversal of 28688485 is 58488682.

It is not a de Polignac number, because 28688485 - 2³ = 28688477 is a prime.

It is a Duffinian number.

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, 148549 + ... + 148741.

It is an arithmetic number, because the mean of its divisors is an integer number (1285056).

Almost surely, 2^28688485 is an apocalyptic number.

It is an amenable number.

28688485 is a deficient number, since it is larger than the sum of its proper divisors (12433307).

28688485 is a wasteful number, since it uses less digits than its factorization.

28688485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373.

The product of its digits is 983040, while the sum is 49.

The square root of 28688485 is about 5356.1632723434. The cubic root of 28688485 is about 306.1276362466.

The spelling of 28688485 in words is "twenty-eight million, six hundred eighty-eight thousand, four hundred eighty-five".