2056404 has 24 divisors (see below), whose sum is σ = 5483968. Its totient is φ = 587520.

The previous prime is 2056403. The next prime is 2056409. The reversal of 2056404 is 4046502.

It is a happy number.

It is a super-2 number, since 2×2056404² = 8457594822432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12157 + ... + 12324.

2^2056404 is an apocalyptic number.

It is an amenable number.

2056404 is an abundant number, since it is smaller than the sum of its proper divisors (3427564).

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

2056404 is a wasteful number, since it uses less digits than its factorization.

2056404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24495 (or 24493 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2056404 is about 1434.0167363040. The cubic root of 2056404 is about 127.1655517649.

The spelling of 2056404 in words is "two million, fifty-six thousand, four hundred four".