2686978 has 16 divisors (see below), whose sum is σ = 4685760. Its totient is φ = 1131696.

The previous prime is 2686973. The next prime is 2686979. The reversal of 2686978 is 8796862.

It is not an unprimeable number, because it can be changed into a prime (2686973) 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, 801 + ... + 2452.

It is an arithmetic number, because the mean of its divisors is an integer number (292860).

2^2686978 is an apocalyptic number.

2686978 is a deficient number, since it is larger than the sum of its proper divisors (1998782).

2686978 is a wasteful number, since it uses less digits than its factorization.

2686978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321.

The product of its digits is 290304, while the sum is 46.

The square root of 2686978 is about 1639.2004148365. The cubic root of 2686978 is about 139.0234420377.

The spelling of 2686978 in words is "two million, six hundred eighty-six thousand, nine hundred seventy-eight".