2587896440 has 64 divisors (see below), whose sum is σ = 5953046400. Its totient is φ = 1012226688.

The previous prime is 2587896433. The next prime is 2587896449. The reversal of 2587896440 is 446987852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2587896449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369047 + ... + 375993.

It is an arithmetic number, because the mean of its divisors is an integer number (93016350).

Almost surely, 2^2587896440 is an apocalyptic number.

2587896440 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 2587896440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2976523200).

2587896440 is an abundant number, since it is smaller than the sum of its proper divisors (3365149960).

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

2587896440 is a wasteful number, since it uses less digits than its factorization.

2587896440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7164 (or 7160 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The square root of 2587896440 is about 50871.3715167971. The cubic root of 2587896440 is about 1372.9318002184.

The spelling of 2587896440 in words is "two billion, five hundred eighty-seven million, eight hundred ninety-six thousand, four hundred forty".