8890561 has 4 divisors (see below), whose sum is σ = 8928000. Its totient is φ = 8853124.

The previous prime is 8890543. The next prime is 8890589. The reversal of 8890561 is 1650988.

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 a cyclic number.

It is not a de Polignac number, because 8890561 - 2⁵ = 8890529 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8890561.

It is not an unprimeable number, because it can be changed into a prime (8890361) 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, 18361 + ... + 18838.

It is an arithmetic number, because the mean of its divisors is an integer number (2232000).

Almost surely, 2^8890561 is an apocalyptic number.

It is an amenable number.

8890561 is a deficient number, since it is larger than the sum of its proper divisors (37439).

8890561 is a wasteful number, since it uses less digits than its factorization.

8890561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37438.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 8890561 is about 2981.7043783715. The cubic root of 8890561 is about 207.1618220109.

The spelling of 8890561 in words is "eight million, eight hundred ninety thousand, five hundred sixty-one".