2194678 has 8 divisors (see below), whose sum is σ = 3311568. Its totient is φ = 1090824.

The previous prime is 2194667. The next prime is 2194679. The reversal of 2194678 is 8764912.

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

It is a super-2 number, since 2×2194678² = 9633223047368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2826 + ... + 3517.

It is an arithmetic number, because the mean of its divisors is an integer number (413946).

2^2194678 is an apocalyptic number.

2194678 is a deficient number, since it is larger than the sum of its proper divisors (1116890).

2194678 is a wasteful number, since it uses less digits than its factorization.

2194678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6518.

The product of its digits is 24192, while the sum is 37.

The square root of 2194678 is about 1481.4445652808. Note that the first 3 decimals coincide. The cubic root of 2194678 is about 129.9541850391.

Subtracting from 2194678 its product of digits (24192), we obtain a triangular number (2170486 = T₂₀₈₃).

The spelling of 2194678 in words is "two million, one hundred ninety-four thousand, six hundred seventy-eight".