7875866240 has 128 divisors (see below), whose sum is σ = 21018381120. Its totient is φ = 2797240320.

The previous prime is 7875866239. The next prime is 7875866249. The reversal of 7875866240 is 426685787.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (7875866249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289712 + ... + 315728.

Almost surely, 2^7875866240 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 7875866240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10509190560).

7875866240 is an abundant number, since it is smaller than the sum of its proper divisors (13142514880).

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

7875866240 is a wasteful number, since it uses less digits than its factorization.

7875866240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26090 (or 26078 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 53.

The square root of 7875866240 is about 88746.0773217611. The cubic root of 7875866240 is about 1989.6015498136.

The spelling of 7875866240 in words is "seven billion, eight hundred seventy-five million, eight hundred sixty-six thousand, two hundred forty".