28339571 has 4 divisors (see below), whose sum is σ = 30519552. Its totient is φ = 26159592.

The previous prime is 28339567. The next prime is 28339573. The reversal of 28339571 is 17593382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17593382 = 2 ⋅8796691.

It is a cyclic number.

It is not a de Polignac number, because 28339571 - 2² = 28339567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28339573) 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, 1089971 + ... + 1089996.

It is an arithmetic number, because the mean of its divisors is an integer number (7629888).

Almost surely, 2^28339571 is an apocalyptic number.

28339571 is a deficient number, since it is larger than the sum of its proper divisors (2179981).

28339571 is a wasteful number, since it uses less digits than its factorization.

28339571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179980.

The product of its digits is 45360, while the sum is 38.

The square root of 28339571 is about 5323.4923687369. The cubic root of 28339571 is about 304.8815126964.

The spelling of 28339571 in words is "twenty-eight million, three hundred thirty-nine thousand, five hundred seventy-one".