2055440 has 20 divisors (see below), whose sum is σ = 4779084. Its totient is φ = 822144.

The previous prime is 2055437. The next prime is 2055467. The reversal of 2055440 is 445502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1336336 + 719104 = 1156^2 + 848^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-4 number, since 4×2055440⁴ (a number of 26 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12767 + ... + 12926.

2^2055440 is an apocalyptic number.

2055440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2055440 is an abundant number, since it is smaller than the sum of its proper divisors (2723644).

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

2055440 is a wasteful number, since it uses less digits than its factorization.

2055440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25706 (or 25700 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 2055440 is about 1433.6805780926. The cubic root of 2055440 is about 127.1456777920.

The spelling of 2055440 in words is "two million, fifty-five thousand, four hundred forty".