8521650 has 72 divisors (see below), whose sum is σ = 23720580. Its totient is φ = 2190720.

The previous prime is 8521649. The next prime is 8521687. The reversal of 8521650 is 561258.

8521650 is a `hidden beast` number, since 8 + 5 + 2 + 1 + 650 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 2064969 + 6456681 = 1437^2 + 2541^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12724 + ... + 13376.

Almost surely, 2^8521650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8521650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11860290).

8521650 is an abundant number, since it is smaller than the sum of its proper divisors (15198930).

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

8521650 is a wasteful number, since it uses less digits than its factorization.

8521650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 8521650 is about 2919.1865305252. The cubic root of 8521650 is about 204.2558784545.

The spelling of 8521650 in words is "eight million, five hundred twenty-one thousand, six hundred fifty".