2686445 has 6 divisors (see below), whose sum is σ = 3228138. Its totient is φ = 2146224.

The previous prime is 2686393. The next prime is 2686451. The reversal of 2686445 is 5446862.

It can be written as a sum of positive squares in 3 ways, for example, as 1800964 + 885481 = 1342^2 + 941^2 .

It is not a de Polignac number, because 2686445 - 2⁶ = 2686381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3299 + ... + 4031.

It is an arithmetic number, because the mean of its divisors is an integer number (538023).

2^2686445 is an apocalyptic number.

It is an amenable number.

2686445 is a deficient number, since it is larger than the sum of its proper divisors (541693).

2686445 is an frugal number, since it uses more digits than its factorization.

2686445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 738 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 2686445 is about 1639.0378275073. The cubic root of 2686445 is about 139.0142490094.

Multiplying 2686445 by its product of digits (46080), we get a square (123791385600 = 351840²).

The spelling of 2686445 in words is "two million, six hundred eighty-six thousand, four hundred forty-five".