2571840 has 168 divisors, whose sum is σ = 9509760. Its totient is φ = 635904.

The previous prime is 2571827. The next prime is 2571851. The reversal of 2571840 is 481752.

It is a super-2 number, since 2×2571840² = 13228721971200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54697 + ... + 54743.

2^2571840 is an apocalyptic number.

2571840 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 2571840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4754880).

2571840 is an abundant number, since it is smaller than the sum of its proper divisors (6937920).

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

2571840 is a wasteful number, since it uses less digits than its factorization.

2571840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2571840 is about 1603.6957317397. The cubic root of 2571840 is about 137.0086484675.

The spelling of 2571840 in words is "two million, five hundred seventy-one thousand, eight hundred forty".