2102638 has 4 divisors (see below), whose sum is σ = 3153960. Its totient is φ = 1051318.

The previous prime is 2102629. The next prime is 2102647. The reversal of 2102638 is 8362012.

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

It is an interprime number because it is at equal distance from previous prime (2102629) and next prime (2102647).

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

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, 525658 + ... + 525661.

It is an arithmetic number, because the mean of its divisors is an integer number (788490).

2^2102638 is an apocalyptic number.

2102638 is a deficient number, since it is larger than the sum of its proper divisors (1051322).

2102638 is a wasteful number, since it uses less digits than its factorization.

2102638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051321.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2102638 is about 1450.0475854261. The cubic root of 2102638 is about 128.1115157731. Note that the first 3 decimals are identical.

The spelling of 2102638 in words is "two million, one hundred two thousand, six hundred thirty-eight".