8505140 has 48 divisors (see below), whose sum is σ = 20697600. Its totient is φ = 2875392.

The previous prime is 8505137. The next prime is 8505187. The reversal of 8505140 is 415058.

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, 10676 + ... + 11444.

It is an arithmetic number, because the mean of its divisors is an integer number (431200).

Almost surely, 2^8505140 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 8505140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10348800).

8505140 is an abundant number, since it is smaller than the sum of its proper divisors (12192460).

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

8505140 is a wasteful number, since it uses less digits than its factorization.

8505140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 8505140 is about 2916.3573169281. The cubic root of 8505140 is about 204.1238834876.

The spelling of 8505140 in words is "eight million, five hundred five thousand, one hundred forty".