2840143540 has 24 divisors (see below), whose sum is σ = 6423094440. Its totient is φ = 1048668288.

The previous prime is 2840143531. The next prime is 2840143549. The reversal of 2840143540 is 453410482.

It is an interprime number because it is at equal distance from previous prime (2840143531) and next prime (2840143549).

It can be written as a sum of positive squares in 4 ways, for example, as 407878416 + 2432265124 = 20196^2 + 49318^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840143549) 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, 5461555 + ... + 5462074.

It is an arithmetic number, because the mean of its divisors is an integer number (267628935).

Almost surely, 2^2840143540 is an apocalyptic number.

2840143540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2840143540 is an abundant number, since it is smaller than the sum of its proper divisors (3582950900).

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

2840143540 is a wasteful number, since it uses less digits than its factorization.

2840143540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10923651 (or 10923649 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 2840143540 is about 53292.9971009325. The cubic root of 2840143540 is about 1416.1636081132.

The spelling of 2840143540 in words is "two billion, eight hundred forty million, one hundred forty-three thousand, five hundred forty".