2106778 has 8 divisors (see below), whose sum is σ = 3168000. Its totient is φ = 1050780.

The previous prime is 2106773. The next prime is 2106779. The reversal of 2106778 is 8776012.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (2106773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58 + ... + 2053.

It is an arithmetic number, because the mean of its divisors is an integer number (396000).

2^2106778 is an apocalyptic number.

2106778 is a deficient number, since it is larger than the sum of its proper divisors (1061222).

2106778 is a wasteful number, since it uses less digits than its factorization.

2106778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 2106778 is about 1451.4744227853. The cubic root of 2106778 is about 128.1955425934.

The spelling of 2106778 in words is "two million, one hundred six thousand, seven hundred seventy-eight".