2087440331840 has 56 divisors (see below), whose sum is σ = 4970841330840. Its totient is φ = 834955296768.

The previous prime is 2087440331819. The next prime is 2087440331861. The reversal of 2087440331840 is 481330447802.

It is an interprime number because it is at equal distance from previous prime (2087440331819) and next prime (2087440331861).

It can be written as a sum of positive squares in 4 ways, for example, as 23413896256 + 2064026435584 = 153016^2 + 1436672^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2087440331791 and 2087440331800.

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, 22779554 + ... + 22871006.

It is an arithmetic number, because the mean of its divisors is an integer number (88765023765).

Almost surely, 2^{2087440331840} is an apocalyptic number.

2087440331840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2087440331840 is an abundant number, since it is smaller than the sum of its proper divisors (2883400999000).

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

2087440331840 is an equidigital number, since it uses as much as digits as its factorization.

2087440331840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162799 (or 162789 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 44.

The spelling of 2087440331840 in words is "two trillion, eighty-seven billion, four hundred forty million, three hundred thirty-one thousand, eight hundred forty".