28549590 has 32 divisors (see below), whose sum is σ = 72126720. Its totient is φ = 7212384.

The previous prime is 28549561. The next prime is 28549621. The reversal of 28549590 is 9594582.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24474 + ... + 25613.

It is an arithmetic number, because the mean of its divisors is an integer number (2253960).

Almost surely, 2^28549590 is an apocalyptic number.

28549590 is an abundant number, since it is smaller than the sum of its proper divisors (43577130).

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

28549590 is a wasteful number, since it uses less digits than its factorization.

28549590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50116.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 28549590 is about 5343.1816364410. The cubic root of 28549590 is about 305.6327988860.

The spelling of 28549590 in words is "twenty-eight million, five hundred forty-nine thousand, five hundred ninety".