8215140 has 48 divisors (see below), whose sum is σ = 24006528. Its totient is φ = 2095104.

The previous prime is 8215133. The next prime is 8215153. The reversal of 8215140 is 415128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1597 + ... + 4356.

It is an arithmetic number, because the mean of its divisors is an integer number (500136).

Almost surely, 2^8215140 is an apocalyptic number.

It is an amenable number.

8215140 is an abundant number, since it is smaller than the sum of its proper divisors (15791388).

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

8215140 is a wasteful number, since it uses less digits than its factorization.

8215140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5988 (or 5986 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 8215140 is about 2866.2065522219. The cubic root of 8215140 is about 201.7769979640.

The spelling of 8215140 in words is "eight million, two hundred fifteen thousand, one hundred forty".