8428564 has 6 divisors (see below), whose sum is σ = 14749994. Its totient is φ = 4214280.

The previous prime is 8428547. The next prime is 8428591. The reversal of 8428564 is 4658248.

It can be written as a sum of positive squares in only one way, i.e., 7236100 + 1192464 = 2690^2 + 1092^2 .

It is a super-2 number, since 2×8428564² = 142081382204192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053567 + ... + 1053574.

Almost surely, 2^8428564 is an apocalyptic number.

It is an amenable number.

8428564 is a deficient number, since it is larger than the sum of its proper divisors (6321430).

8428564 is a wasteful number, since it uses less digits than its factorization.

8428564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107145 (or 2107143 counting only the distinct ones).

The product of its digits is 61440, while the sum is 37.

The square root of 8428564 is about 2903.1989253236. The cubic root of 8428564 is about 203.5094261219.

The spelling of 8428564 in words is "eight million, four hundred twenty-eight thousand, five hundred sixty-four".