2158404 has 36 divisors (see below), whose sum is σ = 5210352. Its totient is φ = 695360.

The previous prime is 2158393. The next prime is 2158423. The reversal of 2158404 is 4048512.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20119 + ... + 20225.

It is an arithmetic number, because the mean of its divisors is an integer number (144732).

2^2158404 is an apocalyptic number.

It is an amenable number.

2158404 is an abundant number, since it is smaller than the sum of its proper divisors (3051948).

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

2158404 is a wasteful number, since it uses less digits than its factorization.

2158404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 2158404 is about 1469.1507751079. The cubic root of 2158404 is about 129.2342358001.

The spelling of 2158404 in words is "two million, one hundred fifty-eight thousand, four hundred four".