8158240 has 24 divisors (see below), whose sum is σ = 19274220. Its totient is φ = 3263232.

The previous prime is 8158229. The next prime is 8158243. The reversal of 8158240 is 428518.

It can be written as a sum of positive squares in 2 ways, for example, as 8133904 + 24336 = 2852^2 + 156^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8158199 and 8158208.

It is not an unprimeable number, because it can be changed into a prime (8158243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25335 + ... + 25654.

Almost surely, 2^8158240 is an apocalyptic number.

8158240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8158240 is an abundant number, since it is smaller than the sum of its proper divisors (11115980).

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

8158240 is a wasteful number, since it uses less digits than its factorization.

8158240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51004 (or 50996 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 8158240 is about 2856.2632931857. The cubic root of 8158240 is about 201.3100665578.

The spelling of 8158240 in words is "eight million, one hundred fifty-eight thousand, two hundred forty".