12158840 has 32 divisors (see below), whose sum is σ = 27514080. Its totient is φ = 4835712.

The previous prime is 12158813. The next prime is 12158849. The reversal of 12158840 is 4885121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12158849) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7109 + ... + 8651.

It is an arithmetic number, because the mean of its divisors is an integer number (859815).

Almost surely, 2^12158840 is an apocalyptic number.

12158840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12158840 is an abundant number, since it is smaller than the sum of its proper divisors (15355240).

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

12158840 is a wasteful number, since it uses less digits than its factorization.

12158840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751 (or 1747 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 12158840 is about 3486.9528244586. The cubic root of 12158840 is about 229.9485707316.

The spelling of 12158840 in words is "twelve million, one hundred fifty-eight thousand, eight hundred forty".