2091678 has 16 divisors (see below), whose sum is σ = 4231440. Its totient is φ = 689216.

The previous prime is 2091671. The next prime is 2091703. The reversal of 2091678 is 8761902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1425 + ... + 2492.

It is an arithmetic number, because the mean of its divisors is an integer number (264465).

2^2091678 is an apocalyptic number.

2091678 is an abundant number, since it is smaller than the sum of its proper divisors (2139762).

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

2091678 is a wasteful number, since it uses less digits than its factorization.

2091678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4011.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 2091678 is about 1446.2634614758. The cubic root of 2091678 is about 127.8885341456. Note that the first 3 decimals are identical.

The spelling of 2091678 in words is "two million, ninety-one thousand, six hundred seventy-eight".