1806564 has 24 divisors (see below), whose sum is σ = 4247488. Its totient is φ = 597600.

The previous prime is 1806557. The next prime is 1806569. The reversal of 1806564 is 4656081.

It is not an unprimeable number, because it can be changed into a prime (1806569) 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, 1314 + ... + 2310.

2^1806564 is an apocalyptic number.

It is an amenable number.

1806564 is an abundant number, since it is smaller than the sum of its proper divisors (2440924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1806564 is a wasteful number, since it uses less digits than its factorization.

1806564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1806564 is about 1344.0848187522. The cubic root of 1806564 is about 121.7917256250.

The spelling of 1806564 in words is "one million, eight hundred six thousand, five hundred sixty-four".