2609986 has 8 divisors (see below), whose sum is σ = 3922380. Its totient is φ = 1302528.

The previous prime is 2609963. The next prime is 2609989. The reversal of 2609986 is 6899062.

It is a happy number.

2609986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2461761 + 148225 = 1569^2 + 385^2 .

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

It is a super-3 number, since 3×2609986³ = 53337884680004031768, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2609989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690 + ... + 2386.

2^2609986 is an apocalyptic number.

2609986 is a deficient number, since it is larger than the sum of its proper divisors (1312394).

2609986 is a wasteful number, since it uses less digits than its factorization.

2609986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 2609986 is about 1615.5451092433. The cubic root of 2609986 is about 137.6827058787.

The spelling of 2609986 in words is "two million, six hundred nine thousand, nine hundred eighty-six".