28080090 has 48 divisors (see below), whose sum is σ = 77307048. Its totient is φ = 7047168.

The previous prime is 28080061. The next prime is 28080097. The reversal of 28080090 is 9008082.

It can be written as a sum of positive squares in 4 ways, for example, as 18326961 + 9753129 = 4281^2 + 3123^2 .

It is not an unprimeable number, because it can be changed into a prime (28080097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7647 + ... + 10706.

Almost surely, 2^28080090 is an apocalyptic number.

28080090 is an abundant number, since it is smaller than the sum of its proper divisors (49226958).

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

28080090 is a wasteful number, since it uses less digits than its factorization.

28080090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18383 (or 18380 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 28080090 is about 5299.0650118677. The cubic root of 28080090 is about 303.9481458763.

The spelling of 28080090 in words is "twenty-eight million, eighty thousand, ninety".