7978571460 has 72 divisors (see below), whose sum is σ = 24225056856. Its totient is φ = 2125562880.

The previous prime is 7978571441. The next prime is 7978571467. The reversal of 7978571460 is 641758797.

7978571460 is a `hidden beast` number, since 7 + 9 + 7 + 8 + 571 + 4 + 60 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 910470276 + 7068101184 = 30174^2 + 84072^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7978571397 and 7978571406.

It is not an unprimeable number, because it can be changed into a prime (7978571467) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 170092 + ... + 211868.

It is an arithmetic number, because the mean of its divisors is an integer number (336459123).

Almost surely, 2^7978571460 is an apocalyptic number.

It is an amenable number.

7978571460 is an abundant number, since it is smaller than the sum of its proper divisors (16246485396).

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

7978571460 is a wasteful number, since it uses less digits than its factorization.

7978571460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42853 (or 42848 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The square root of 7978571460 is about 89322.8495962819. The cubic root of 7978571460 is about 1998.2126915734.

The spelling of 7978571460 in words is "seven billion, nine hundred seventy-eight million, five hundred seventy-one thousand, four hundred sixty".