2158458 has 16 divisors (see below), whose sum is σ = 4504896. Its totient is φ = 688160.

The previous prime is 2158447. The next prime is 2158459. The reversal of 2158458 is 8548512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158459) 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, 7683 + ... + 7958.

It is an arithmetic number, because the mean of its divisors is an integer number (281556).

2^2158458 is an apocalyptic number.

2158458 is an abundant number, since it is smaller than the sum of its proper divisors (2346438).

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

2158458 is a wasteful number, since it uses less digits than its factorization.

2158458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15669.

The product of its digits is 12800, while the sum is 33.

The square root of 2158458 is about 1469.1691529569. The cubic root of 2158458 is about 129.2353135394.

The spelling of 2158458 in words is "two million, one hundred fifty-eight thousand, four hundred fifty-eight".