2020406 has 4 divisors (see below), whose sum is σ = 3030612. Its totient is φ = 1010202.

The previous prime is 2020393. The next prime is 2020409. The reversal of 2020406 is 6040202.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505100 + ... + 505103.

It is an arithmetic number, because the mean of its divisors is an integer number (757653).

2^2020406 is an apocalyptic number.

2020406 is a deficient number, since it is larger than the sum of its proper divisors (1010206).

2020406 is a wasteful number, since it uses less digits than its factorization.

2020406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010205.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2020406 is about 1421.4098634806. The cubic root of 2020406 is about 126.4191550178.

Adding to 2020406 its reverse (6040202), we get a palindrome (8060608).

The spelling of 2020406 in words is "two million, twenty thousand, four hundred six".