28560090 has 64 divisors (see below), whose sum is σ = 74987136. Its totient is φ = 6918912.

The previous prime is 28560053. The next prime is 28560107. The reversal of 28560090 is 9006582.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25584 + ... + 26676.

It is an arithmetic number, because the mean of its divisors is an integer number (1171674).

Almost surely, 2^28560090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28560090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37493568).

28560090 is an abundant number, since it is smaller than the sum of its proper divisors (46427046).

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

28560090 is a wasteful number, since it uses less digits than its factorization.

28560090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 28560090 is about 5344.1641067617. The cubic root of 28560090 is about 305.6702629505.

The spelling of 28560090 in words is "twenty-eight million, five hundred sixty thousand, ninety".