9000784 has 40 divisors (see below), whose sum is σ = 19000520. Its totient is φ = 4105728.

The previous prime is 9000781. The next prime is 9000787. The reversal of 9000784 is 4870009.

It is an interprime number because it is at equal distance from previous prime (9000781) and next prime (9000787).

It can be written as a sum of positive squares in 4 ways, for example, as 1272384 + 7728400 = 1128^2 + 2780^2 .

It is a super-2 number, since 2×9000784² = 162028225229312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9000781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22474 + ... + 22870.

It is an arithmetic number, because the mean of its divisors is an integer number (475013).

Almost surely, 2^9000784 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 9000784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9500260).

9000784 is an abundant number, since it is smaller than the sum of its proper divisors (9999736).

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

9000784 is a wasteful number, since it uses less digits than its factorization.

9000784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 9000784 is about 3000.1306638212. The cubic root of 9000784 is about 208.0144220769.

The spelling of 9000784 in words is "nine million, seven hundred eighty-four", and thus it is an aban number.