2857040 has 40 divisors (see below), whose sum is σ = 6749568. Its totient is φ = 1124480.

The previous prime is 2857039. The next prime is 2857061. The reversal of 2857040 is 407582.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5429 + ... + 5931.

2^2857040 is an apocalyptic number.

2857040 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 2857040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3374784).

2857040 is an abundant number, since it is smaller than the sum of its proper divisors (3892528).

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

2857040 is a wasteful number, since it uses less digits than its factorization.

2857040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2857040 is about 1690.2780836300. The cubic root of 2857040 is about 141.8966383965.

The spelling of 2857040 in words is "two million, eight hundred fifty-seven thousand, forty".