2173678 has 24 divisors (see below), whose sum is σ = 3623400. Its totient is φ = 977184.

The previous prime is 2173663. The next prime is 2173679. The reversal of 2173678 is 8763712.

2173678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

Its product of digits (14112) is a multiple of the sum of its prime factors (196).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173679) 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 11 ways as a sum of consecutive naturals, for example, 19888 + ... + 19996.

It is an arithmetic number, because the mean of its divisors is an integer number (150975).

2^2173678 is an apocalyptic number.

2173678 is a deficient number, since it is larger than the sum of its proper divisors (1449722).

2173678 is a wasteful number, since it uses less digits than its factorization.

2173678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 183 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 2173678 is about 1474.3398522729. The cubic root of 2173678 is about 129.5383626400.

Adding to 2173678 its sum of digits (34), we get a palindrome (2173712).

The spelling of 2173678 in words is "two million, one hundred seventy-three thousand, six hundred seventy-eight".