7869911040 has 156 divisors (see below), whose sum is σ = 27279666804. Its totient is φ = 2098593792.

The previous prime is 7869911029. The next prime is 7869911051. The reversal of 7869911040 is 401199687.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7869911029) and next prime (7869911051).

It can be written as a sum of positive squares in 2 ways, for example, as 1882865664 + 5987045376 = 43392^2 + 77376^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162972 + ... + 205668.

It is an arithmetic number, because the mean of its divisors is an integer number (174869659).

Almost surely, 2^7869911040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7869911040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13639833402).

7869911040 is an abundant number, since it is smaller than the sum of its proper divisors (19409755764).

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

7869911040 is a wasteful number, since it uses less digits than its factorization.

7869911040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42732 (or 42707 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 7869911040 is about 88712.5190714366. The cubic root of 7869911040 is about 1989.0999557716.

The spelling of 7869911040 in words is "seven billion, eight hundred sixty-nine million, nine hundred eleven thousand, forty".