2685618 has 48 divisors (see below), whose sum is σ = 6552000. Its totient is φ = 788832.

The previous prime is 2685607. The next prime is 2685629. The reversal of 2685618 is 8165862.

It is a happy number.

It is a Cunningham number, because it is equal to 139³-1.

It is an interprime number because it is at equal distance from previous prime (2685607) and next prime (2685629).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5133 + ... + 5631.

It is an arithmetic number, because the mean of its divisors is an integer number (136500).

2^2685618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2685618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3276000).

2685618 is an abundant number, since it is smaller than the sum of its proper divisors (3866382).

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

2685618 is a wasteful number, since it uses less digits than its factorization.

2685618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 540 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 2685618 is about 1638.7855259307. The cubic root of 2685618 is about 138.9999827476. Note that the first 4 decimals are identical.

It can be divided in two parts, 268 and 5618, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 2685618 in words is "two million, six hundred eighty-five thousand, six hundred eighteen".