7879894722 has 126 divisors (see below), whose sum is σ = 20250486009. Its totient is φ = 2214490320.

The previous prime is 7879894697. The next prime is 7879894747. The reversal of 7879894722 is 2274989787.

7879894722 is a `hidden beast` number, since 7 + 87 + 9 + 89 + 472 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (7879894697) and next prime (7879894747).

It can be written as a sum of positive squares in 2 ways, for example, as 5337617481 + 2542277241 = 73059^2 + 50421^2 .

It is a tau number, because it is divible by the number of its divisors (126).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=62769.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 7879894722.

It is an unprimeable number.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 129178572 + ... + 129178632.

Almost surely, 2^7879894722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7879894722

7879894722 is an abundant number, since it is smaller than the sum of its proper divisors (12370591287).

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

7879894722 is an frugal number, since it uses more digits than its factorization.

7879894722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 73 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 63.

The square root of 7879894722 is about 88768.7710965968. The cubic root of 7879894722 is about 1989.9407170710.

The spelling of 7879894722 in words is "seven billion, eight hundred seventy-nine million, eight hundred ninety-four thousand, seven hundred twenty-two".