9021900 has 144 divisors (see below), whose sum is σ = 29060640. Its totient is φ = 2150400.

The previous prime is 9021893. The next prime is 9021907. The reversal of 9021900 is 91209.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9021893) and next prime (9021907).

It is a super-2 number, since 2×9021900² = 162789359220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9021907) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 147870 + ... + 147930.

It is an arithmetic number, because the mean of its divisors is an integer number (201810).

Almost surely, 2^9021900 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 9021900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14530320).

9021900 is an abundant number, since it is smaller than the sum of its proper divisors (20038740).

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

9021900 is a wasteful number, since it uses less digits than its factorization.

9021900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 9021900 is about 3003.6477822807. The cubic root of 9021900 is about 208.1769635510.

The spelling of 9021900 in words is "nine million, twenty-one thousand, nine hundred".