2020638 has 8 divisors (see below), whose sum is σ = 4041288. Its totient is φ = 673544.

The previous prime is 2020621. The next prime is 2020657. The reversal of 2020638 is 8360202.

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

2020638 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168381 + ... + 168392.

It is an arithmetic number, because the mean of its divisors is an integer number (505161).

2^2020638 is an apocalyptic number.

2020638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2020638 is a wasteful number, since it uses less digits than its factorization.

2020638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336778.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2020638 is about 1421.4914702523. The cubic root of 2020638 is about 126.4239936693.

The spelling of 2020638 in words is "two million, twenty thousand, six hundred thirty-eight".