861748722 has 24 divisors (see below), whose sum is σ = 1917586476. Its totient is φ = 279485856.

The previous prime is 861748703. The next prime is 861748733. The reversal of 861748722 is 227847168.

861748722 is a `hidden beast` number, since 8 + 617 + 4 + 8 + 7 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 856089081 + 5659641 = 29259^2 + 2379^2 .

It is a super-2 number, since 2×861748722² = 1485221719737266568, which contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 646293 + ... + 647624.

Almost surely, 2^861748722 is an apocalyptic number.

861748722 is an abundant number, since it is smaller than the sum of its proper divisors (1055837754).

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

861748722 is a wasteful number, since it uses less digits than its factorization.

861748722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293962 (or 1293959 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 861748722 is about 29355.5569185802. The cubic root of 861748722 is about 951.6126706526.

The spelling of 861748722 in words is "eight hundred sixty-one million, seven hundred forty-eight thousand, seven hundred twenty-two".