861946722 has 96 divisors (see below), whose sum is σ = 2327969280. Its totient is φ = 224415360.

The previous prime is 861946721. The next prime is 861946727. The reversal of 861946722 is 227649168.

It is a happy number.

861946722 is a `hidden beast` number, since 8 + 619 + 4 + 6 + 7 + 22 = 666.

It is not an unprimeable number, because it can be changed into a prime (861946721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 126072 + ... + 132732.

It is an arithmetic number, because the mean of its divisors is an integer number (24249680).

Almost surely, 2^861946722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861946722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1163984640).

861946722 is an abundant number, since it is smaller than the sum of its proper divisors (1466022558).

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

861946722 is a wasteful number, since it uses less digits than its factorization.

861946722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768 (or 6765 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 861946722 is about 29358.9291698454. The cubic root of 861946722 is about 951.6855476120.

The spelling of 861946722 in words is "eight hundred sixty-one million, nine hundred forty-six thousand, seven hundred twenty-two".