2606778 has 24 divisors (see below), whose sum is σ = 5710068. Its totient is φ = 859392.

The previous prime is 2606771. The next prime is 2606783. The reversal of 2606778 is 8776062.

It can be written as a sum of positive squares in 2 ways, for example, as 2518569 + 88209 = 1587^2 + 297^2 .

It is not an unprimeable number, because it can be changed into a prime (2606771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1000 + ... + 2492.

2^2606778 is an apocalyptic number.

2606778 is an abundant number, since it is smaller than the sum of its proper divisors (3103290).

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

2606778 is a wasteful number, since it uses less digits than its factorization.

2606778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598 (or 1595 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 2606778 is about 1614.5519502326. The cubic root of 2606778 is about 137.6262729826.

The spelling of 2606778 in words is "two million, six hundred six thousand, seven hundred seventy-eight".