28000578 has 16 divisors (see below), whose sum is σ = 56077056. Its totient is φ = 9320880.

The previous prime is 28000571. The next prime is 28000597. The reversal of 28000578 is 87500082.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28000571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2383 + ... + 7853.

It is an arithmetic number, because the mean of its divisors is an integer number (3504816).

Almost surely, 2^28000578 is an apocalyptic number.

28000578 is an abundant number, since it is smaller than the sum of its proper divisors (28076478).

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

28000578 is a wasteful number, since it uses less digits than its factorization.

28000578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6329.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 28000578 is about 5291.5572377137. The cubic root of 28000578 is about 303.6609866356.

The spelling of 28000578 in words is "twenty-eight million, five hundred seventy-eight", and thus it is an aban number.