8028561 has 4 divisors (see below), whose sum is σ = 10704752. Its totient is φ = 5352372.

The previous prime is 8028557. The next prime is 8028577. The reversal of 8028561 is 1658208.

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.

It is not a de Polignac number, because 8028561 - 2² = 8028557 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 (8028521) 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, 1338091 + ... + 1338096.

It is an arithmetic number, because the mean of its divisors is an integer number (2676188).

Almost surely, 2^8028561 is an apocalyptic number.

It is an amenable number.

8028561 is a deficient number, since it is larger than the sum of its proper divisors (2676191).

8028561 is a wasteful number, since it uses less digits than its factorization.

8028561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676190.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 8028561 is about 2833.4715456486. The cubic root of 8028561 is about 200.2377256539.

The spelling of 8028561 in words is "eight million, twenty-eight thousand, five hundred sixty-one".