2158444 has 12 divisors (see below), whose sum is σ = 3816904. Its totient is φ = 1067904.

The previous prime is 2158433. The next prime is 2158447. The reversal of 2158444 is 4448512.

It is a super-2 number, since 2×2158444² = 9317761002272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2158447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2394 + ... + 3169.

2^2158444 is an apocalyptic number.

It is an amenable number.

2158444 is a deficient number, since it is larger than the sum of its proper divisors (1658460).

2158444 is a wasteful number, since it uses less digits than its factorization.

2158444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5664 (or 5662 counting only the distinct ones).

The product of its digits is 5120, while the sum is 28.

The square root of 2158444 is about 1469.1643883514. The cubic root of 2158444 is about 129.2350341272.

The spelling of 2158444 in words is "two million, one hundred fifty-eight thousand, four hundred forty-four".