8128140 has 24 divisors (see below), whose sum is σ = 22758960. Its totient is φ = 2167488.

The previous prime is 8128129. The next prime is 8128147. The reversal of 8128140 is 418218.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 8128140.

It is not an unprimeable number, because it can be changed into a prime (8128147) 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, 67675 + ... + 67794.

It is an arithmetic number, because the mean of its divisors is an integer number (948290).

Almost surely, 2^8128140 is an apocalyptic number.

It is an amenable number.

8128140 is an abundant number, since it is smaller than the sum of its proper divisors (14630820).

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

8128140 is a wasteful number, since it uses less digits than its factorization.

8128140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135481 (or 135479 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 8128140 is about 2850.9893019792. The cubic root of 8128140 is about 201.0621821917.

The spelling of 8128140 in words is "eight million, one hundred twenty-eight thousand, one hundred forty".