2055240 has 128 divisors (see below), whose sum is σ = 7516800. Its totient is φ = 495360.

The previous prime is 2055233. The next prime is 2055247. The reversal of 2055240 is 425502.

It is an interprime number because it is at equal distance from previous prime (2055233) and next prime (2055247).

It is a super-2 number, since 2×2055240² = 8448022915200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2055247) 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 31 ways as a sum of consecutive naturals, for example, 11794 + ... + 11966.

It is an arithmetic number, because the mean of its divisors is an integer number (58725).

2^2055240 is an apocalyptic number.

2055240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2055240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3758400).

2055240 is an abundant number, since it is smaller than the sum of its proper divisors (5461560).

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

2055240 is a wasteful number, since it uses less digits than its factorization.

2055240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 2055240 is about 1433.6108258520. The cubic root of 2055240 is about 127.1415537828.

It can be divided in two parts, 205 and 5240, that added together give a palindrome (5445).

The spelling of 2055240 in words is "two million, fifty-five thousand, two hundred forty".