2198478 has 32 divisors (see below), whose sum is σ = 4665600. Its totient is φ = 689216.

The previous prime is 2198477. The next prime is 2198507. The reversal of 2198478 is 8748912.

2198478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12193 + ... + 12371.

It is an arithmetic number, because the mean of its divisors is an integer number (145800).

2^2198478 is an apocalyptic number.

2198478 is an abundant number, since it is smaller than the sum of its proper divisors (2467122).

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

2198478 is a wasteful number, since it uses less digits than its factorization.

2198478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296.

The product of its digits is 32256, while the sum is 39.

The square root of 2198478 is about 1482.7265425560. The cubic root of 2198478 is about 130.0291453390.

The spelling of 2198478 in words is "two million, one hundred ninety-eight thousand, four hundred seventy-eight".