2057440 has 96 divisors (see below), whose sum is σ = 6096384. Its totient is φ = 637440.

The previous prime is 2057431. The next prime is 2057441. The reversal of 2057440 is 447502.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2057441) 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 15 ways as a sum of consecutive naturals, for example, 12237 + ... + 12403.

It is an arithmetic number, because the mean of its divisors is an integer number (63504).

2^2057440 is an apocalyptic number.

2057440 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 2057440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3048192).

2057440 is an abundant number, since it is smaller than the sum of its proper divisors (4038944).

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

2057440 is a wasteful number, since it uses less digits than its factorization.

2057440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 2057440 is about 1434.3779139404. The cubic root of 2057440 is about 127.1869031780.

The spelling of 2057440 in words is "two million, fifty-seven thousand, four hundred forty".