8621000 has 64 divisors (see below), whose sum is σ = 20807280. Its totient is φ = 3340800.

The previous prime is 8620993. The next prime is 8621009. The reversal of 8621000 is 1268.

It can be written as a sum of positive squares in 8 ways, for example, as 521284 + 8099716 = 722^2 + 2846^2 .

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 8621000.

It is not an unprimeable number, because it can be changed into a prime (8621009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36884 + ... + 37116.

Almost surely, 2^8621000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8621000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10403640).

8621000 is an abundant number, since it is smaller than the sum of its proper divisors (12186280).

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

8621000 is a wasteful number, since it uses less digits than its factorization.

8621000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 8621000 is about 2936.1539469176. The cubic root of 8621000 is about 205.0465886579.

Adding to 8621000 its reverse (1268), we get a palindrome (8622268).

The spelling of 8621000 in words is "eight million, six hundred twenty-one thousand".