2638985 has 8 divisors (see below), whose sum is σ = 3205440. Its totient is φ = 2085424.

The previous prime is 2638973. The next prime is 2639041. The reversal of 2638985 is 5898362.

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

It is a cyclic number.

It is not a de Polignac number, because 2638985 - 2¹⁰ = 2637961 is a prime.

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, 2765 + ... + 3594.

It is an arithmetic number, because the mean of its divisors is an integer number (400680).

2^2638985 is an apocalyptic number.

It is an amenable number.

2638985 is a deficient number, since it is larger than the sum of its proper divisors (566455).

2638985 is an equidigital number, since it uses as much as digits as its factorization.

2638985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447.

The product of its digits is 103680, while the sum is 41.

The square root of 2638985 is about 1624.4953062413. The cubic root of 2638985 is about 138.1907500076.

The spelling of 2638985 in words is "two million, six hundred thirty-eight thousand, nine hundred eighty-five".