28209088 has 28 divisors (see below), whose sum is σ = 56176672. Its totient is φ = 14054400.

The previous prime is 28209061. The next prime is 28209119. The reversal of 28209088 is 88090282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22888 + ... + 24088.

Almost surely, 2^28209088 is an apocalyptic number.

It is an amenable number.

28209088 is a deficient number, since it is larger than the sum of its proper divisors (27967584).

28209088 is a wasteful number, since it uses less digits than its factorization.

28209088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1570 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 28209088 is about 5311.2228347152. Note that the first 3 decimals coincide. The cubic root of 28209088 is about 304.4128739095.

The spelling of 28209088 in words is "twenty-eight million, two hundred nine thousand, eighty-eight".