2531840 has 80 divisors (see below), whose sum is σ = 6481728. Its totient is φ = 946176.

The previous prime is 2531833. The next prime is 2531869. The reversal of 2531840 is 481352.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 58859 + ... + 58901.

2^2531840 is an apocalyptic number.

2531840 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 2531840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3240864).

2531840 is an abundant number, since it is smaller than the sum of its proper divisors (3949888).

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

2531840 is an equidigital number, since it uses as much as digits as its factorization.

2531840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2531840 is about 1591.1756659778. The cubic root of 2531840 is about 136.2946322932.

The spelling of 2531840 in words is "two million, five hundred thirty-one thousand, eight hundred forty".