7878941280 has 720 divisors, whose sum is σ = 34100423280. Its totient is φ = 1703503872.

The previous prime is 7878941233. The next prime is 7878941327. The reversal of 7878941280 is 821498787.

It is a happy number.

7878941280 is a `hidden beast` number, since 78 + 7 + 89 + 412 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (7878941233) and next prime (7878941327).

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 12065434 + ... + 12066086.

It is an arithmetic number, because the mean of its divisors is an integer number (47361699).

Almost surely, 2^7878941280 is an apocalyptic number.

7878941280 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7878941280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17050211640).

7878941280 is an abundant number, since it is smaller than the sum of its proper divisors (26221482000).

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

7878941280 is a wasteful number, since it uses less digits than its factorization.

7878941280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The square root of 7878941280 is about 88763.4005657737. The cubic root of 7878941280 is about 1989.8604550180.

The spelling of 7878941280 in words is "seven billion, eight hundred seventy-eight million, nine hundred forty-one thousand, two hundred eighty".