2587323640 has 48 divisors (see below), whose sum is σ = 6398826840. Its totient is φ = 940843200.

The previous prime is 2587323617. The next prime is 2587323649. The reversal of 2587323640 is 463237852.

It is a super-3 number, since 3×2587323640³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2587323593 and 2587323602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2587323649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262446 + ... + 272125.

Almost surely, 2^2587323640 is an apocalyptic number.

2587323640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2587323640 is an abundant number, since it is smaller than the sum of its proper divisors (3811503200).

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

2587323640 is a wasteful number, since it uses less digits than its factorization.

2587323640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534604 (or 534589 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 2587323640 is about 50865.7413196741. The cubic root of 2587323640 is about 1372.8304987197.

The spelling of 2587323640 in words is "two billion, five hundred eighty-seven million, three hundred twenty-three thousand, six hundred forty".