28575329 has 4 divisors (see below), whose sum is σ = 28594176. Its totient is φ = 28556484.

The previous prime is 28575311. The next prime is 28575341. The reversal of 28575329 is 92357582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92357582 = 2 ⋅46178791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28575329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28575229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6929 + ... + 10254.

It is an arithmetic number, because the mean of its divisors is an integer number (7148544).

Almost surely, 2^28575329 is an apocalyptic number.

It is an amenable number.

28575329 is a deficient number, since it is larger than the sum of its proper divisors (18847).

28575329 is a wasteful number, since it uses less digits than its factorization.

28575329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18846.

The product of its digits is 151200, while the sum is 41.

The square root of 28575329 is about 5345.5896774818. The cubic root of 28575329 is about 305.7246194657.

The spelling of 28575329 in words is "twenty-eight million, five hundred seventy-five thousand, three hundred twenty-nine".