7871903540 has 12 divisors (see below), whose sum is σ = 16530997476. Its totient is φ = 3148761408.

The previous prime is 7871903531. The next prime is 7871903593. The reversal of 7871903540 is 453091787.

It can be written as a sum of positive squares in 2 ways, for example, as 5745033616 + 2126869924 = 75796^2 + 46118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7871903491 and 7871903500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196797569 + ... + 196797608.

It is an arithmetic number, because the mean of its divisors is an integer number (1377583123).

Almost surely, 2^7871903540 is an apocalyptic number.

It is an amenable number.

7871903540 is an abundant number, since it is smaller than the sum of its proper divisors (8659093936).

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

7871903540 is a wasteful number, since it uses less digits than its factorization.

7871903540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393595186 (or 393595184 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 7871903540 is about 88723.7484555291. The cubic root of 7871903540 is about 1989.2678080390.

The spelling of 7871903540 in words is "seven billion, eight hundred seventy-one million, nine hundred three thousand, five hundred forty".