8999540 has 48 divisors (see below), whose sum is σ = 21712320. Its totient is φ = 3098880.

The previous prime is 8999527. The next prime is 8999567. The reversal of 8999540 is 459998.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 8999491 and 8999500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3104 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (452340).

Almost surely, 2^8999540 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 8999540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10856160).

8999540 is an abundant number, since it is smaller than the sum of its proper divisors (12712780).

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

8999540 is a wasteful number, since it uses less digits than its factorization.

8999540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192 (or 2190 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 8999540 is about 2999.9233323537. The cubic root of 8999540 is about 208.0048383983.

The spelling of 8999540 in words is "eight million, nine hundred ninety-nine thousand, five hundred forty".