2587440 has 40 divisors (see below), whose sum is σ = 8021808. Its totient is φ = 689920.

The previous prime is 2587423. The next prime is 2587441. The reversal of 2587440 is 447852.

2587440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2587398 and 2587407.

It is not an unprimeable number, because it can be changed into a prime (2587441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5151 + ... + 5630.

2^2587440 is an apocalyptic number.

2587440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2587440 is an abundant number, since it is smaller than the sum of its proper divisors (5434368).

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

2587440 is a wasteful number, since it uses less digits than its factorization.

2587440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10797 (or 10791 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 2587440 is about 1608.5521440103. The cubic root of 2587440 is about 137.2851078565.

The spelling of 2587440 in words is "two million, five hundred eighty-seven thousand, four hundred forty".