2638646 has 4 divisors (see below), whose sum is σ = 3957972. Its totient is φ = 1319322.

The previous prime is 2638633. The next prime is 2638651. The reversal of 2638646 is 6468362.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659660 + ... + 659663.

It is an arithmetic number, because the mean of its divisors is an integer number (989493).

2^2638646 is an apocalyptic number.

2638646 is a deficient number, since it is larger than the sum of its proper divisors (1319326).

2638646 is a wasteful number, since it uses less digits than its factorization.

2638646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319325.

The product of its digits is 41472, while the sum is 35.

The square root of 2638646 is about 1624.3909627919. The cubic root of 2638646 is about 138.1848324964.

The spelling of 2638646 in words is "two million, six hundred thirty-eight thousand, six hundred forty-six".