28569906 has 24 divisors (see below), whose sum is σ = 62000640. Its totient is φ = 9508056.

The previous prime is 28569889. The next prime is 28569913. The reversal of 28569906 is 60996582.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19135 + ... + 20573.

It is an arithmetic number, because the mean of its divisors is an integer number (2583360).

Almost surely, 2^28569906 is an apocalyptic number.

28569906 is an abundant number, since it is smaller than the sum of its proper divisors (33430734).

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

28569906 is a wasteful number, since it uses less digits than its factorization.

28569906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550 (or 2547 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 28569906 is about 5345.0824128352. The cubic root of 28569906 is about 305.7052781952.

The spelling of 28569906 in words is "twenty-eight million, five hundred sixty-nine thousand, nine hundred six".