2640006 has 16 divisors (see below), whose sum is σ = 5866800. Its totient is φ = 879984.

The previous prime is 2639999. The next prime is 2640013. The reversal of 2640006 is 6000462.

It is an interprime number because it is at equal distance from previous prime (2639999) and next prime (2640013).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24391 + ... + 24498.

It is an arithmetic number, because the mean of its divisors is an integer number (366675).

2^2640006 is an apocalyptic number.

2640006 is an abundant number, since it is smaller than the sum of its proper divisors (3226794).

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

2640006 is a wasteful number, since it uses less digits than its factorization.

2640006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48900 (or 48894 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2640006 is about 1624.8095272985. The cubic root of 2640006 is about 138.2085693035.

Adding to 2640006 its reverse (6000462), we get a palindrome (8640468).

The spelling of 2640006 in words is "two million, six hundred forty thousand, six".