2158198 has 8 divisors (see below), whose sum is σ = 3699792. Its totient is φ = 924936.

The previous prime is 2158183. The next prime is 2158223. The reversal of 2158198 is 8918512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77065 + ... + 77092.

It is an arithmetic number, because the mean of its divisors is an integer number (462474).

2^2158198 is an apocalyptic number.

2158198 is a deficient number, since it is larger than the sum of its proper divisors (1541594).

2158198 is a wasteful number, since it uses less digits than its factorization.

2158198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154166.

The product of its digits is 5760, while the sum is 34.

The square root of 2158198 is about 1469.0806649058. The cubic root of 2158198 is about 129.2301242591.

The spelling of 2158198 in words is "two million, one hundred fifty-eight thousand, one hundred ninety-eight".