8523990 has 48 divisors (see below), whose sum is σ = 22593168. Its totient is φ = 2228928.

The previous prime is 8523979. The next prime is 8524013. The reversal of 8523990 is 993258.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3877 + ... + 5663.

It is an arithmetic number, because the mean of its divisors is an integer number (470691).

Almost surely, 2^8523990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8523990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11296584).

8523990 is an abundant number, since it is smaller than the sum of its proper divisors (14069178).

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

8523990 is a wasteful number, since it uses less digits than its factorization.

8523990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1850 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 8523990 is about 2919.5872996025. The cubic root of 8523990 is about 204.2745726047.

The spelling of 8523990 in words is "eight million, five hundred twenty-three thousand, nine hundred ninety".