28045590 has 16 divisors (see below), whose sum is σ = 67309488. Its totient is φ = 7478816.

The previous prime is 28045573. The next prime is 28045609. The reversal of 28045590 is 9554082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467397 + ... + 467456.

It is an arithmetic number, because the mean of its divisors is an integer number (4206843).

Almost surely, 2^28045590 is an apocalyptic number.

28045590 is an abundant number, since it is smaller than the sum of its proper divisors (39263898).

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

28045590 is a wasteful number, since it uses less digits than its factorization.

28045590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934863.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28045590 is about 5295.8087201106. The cubic root of 28045590 is about 303.8236150727.

The spelling of 28045590 in words is "twenty-eight million, forty-five thousand, five hundred ninety".