28345806 has 24 divisors (see below), whose sum is σ = 62016240. Its totient is φ = 9356256.

The previous prime is 28345781. The next prime is 28345813. The reversal of 28345806 is 60854382.

It is a congruent number.

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, 5791 + ... + 9498.

It is an arithmetic number, because the mean of its divisors is an integer number (2584010).

Almost surely, 2^28345806 is an apocalyptic number.

28345806 is an abundant number, since it is smaller than the sum of its proper divisors (33670434).

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

28345806 is a wasteful number, since it uses less digits than its factorization.

28345806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15400 (or 15397 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 28345806 is about 5324.0779483400. The cubic root of 28345806 is about 304.9038700902.

The spelling of 28345806 in words is "twenty-eight million, three hundred forty-five thousand, eight hundred six".