28574009 has 2 divisors, whose sum is σ = 28574010. Its totient is φ = 28574008.

The previous prime is 28574003. The next prime is 28574017. The reversal of 28574009 is 90047582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21418384 + 7155625 = 4628^2 + 2675^2 .

It is a cyclic number.

It is not a de Polignac number, because 28574009 - 2¹² = 28569913 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28574009.

It is not a weakly prime, because it can be changed into another prime (28574003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14287004 + 14287005.

It is an arithmetic number, because the mean of its divisors is an integer number (14287005).

Almost surely, 2^28574009 is an apocalyptic number.

It is an amenable number.

28574009 is a deficient number, since it is larger than the sum of its proper divisors (1).

28574009 is an equidigital number, since it uses as much as digits as its factorization.

28574009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28574009 is about 5345.4662097894. The cubic root of 28574009 is about 305.7199118767.

The spelling of 28574009 in words is "twenty-eight million, five hundred seventy-four thousand, nine".