28307573 has 8 divisors (see below), whose sum is σ = 32672640. Its totient is φ = 24022800.

The previous prime is 28307569. The next prime is 28307611. The reversal of 28307573 is 37570382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28307573 - 2² = 28307569 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28307173) 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, 19313 + ... + 20726.

It is an arithmetic number, because the mean of its divisors is an integer number (4084080).

Almost surely, 2^28307573 is an apocalyptic number.

It is an amenable number.

28307573 is a deficient number, since it is larger than the sum of its proper divisors (4365067).

28307573 is a wasteful number, since it uses less digits than its factorization.

28307573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40147.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 28307573 is about 5320.4861619969. The cubic root of 28307573 is about 304.7667229959.

The spelling of 28307573 in words is "twenty-eight million, three hundred seven thousand, five hundred seventy-three".