2158438 has 16 divisors (see below), whose sum is σ = 3456000. Its totient is φ = 1008072.

The previous prime is 2158433. The next prime is 2158447. The reversal of 2158438 is 8348512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158433) 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, 2643 + ... + 3361.

It is an arithmetic number, because the mean of its divisors is an integer number (216000).

2^2158438 is an apocalyptic number.

2158438 is a deficient number, since it is larger than the sum of its proper divisors (1297562).

2158438 is a wasteful number, since it uses less digits than its factorization.

2158438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819.

The product of its digits is 7680, while the sum is 31.

The square root of 2158438 is about 1469.1623463729. The cubic root of 2158438 is about 129.2349143788.

The spelling of 2158438 in words is "two million, one hundred fifty-eight thousand, four hundred thirty-eight".