2078686 has 4 divisors (see below), whose sum is σ = 3118032. Its totient is φ = 1039342.

The previous prime is 2078677. The next prime is 2078693. The reversal of 2078686 is 6868702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6868702 = 2 ⋅3434351.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519670 + ... + 519673.

It is an arithmetic number, because the mean of its divisors is an integer number (779508).

2^2078686 is an apocalyptic number.

2078686 is a deficient number, since it is larger than the sum of its proper divisors (1039346).

2078686 is a wasteful number, since it uses less digits than its factorization.

2078686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039345.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 2078686 is about 1441.7648906809. The cubic root of 2078686 is about 127.6232001525.

The spelling of 2078686 in words is "two million, seventy-eight thousand, six hundred eighty-six".