8621900 has 72 divisors (see below), whose sum is σ = 21769440. Its totient is φ = 2903040.

The previous prime is 8621897. The next prime is 8621911. The reversal of 8621900 is 91268.

It is a super-2 number, since 2×8621900² = 148674319220000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8621900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76244 + ... + 76356.

Almost surely, 2^8621900 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 8621900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10884720).

8621900 is an abundant number, since it is smaller than the sum of its proper divisors (13147540).

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

8621900 is a wasteful number, since it uses less digits than its factorization.

8621900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 8621900 is about 2936.3072046365. The cubic root of 8621900 is about 205.0537237740.

The spelling of 8621900 in words is "eight million, six hundred twenty-one thousand, nine hundred".