1944706686 has 64 divisors (see below), whose sum is σ = 4296112128. Its totient is φ = 583123968.

The previous prime is 1944706681. The next prime is 1944706723. The reversal of 1944706686 is 6866074491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944706681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 963150 + ... + 965166.

It is an arithmetic number, because the mean of its divisors is an integer number (67126752).

Almost surely, 2^1944706686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1944706686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2148056064).

1944706686 is an abundant number, since it is smaller than the sum of its proper divisors (2351405442).

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

1944706686 is a wasteful number, since it uses less digits than its factorization.

1944706686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 1944706686 is about 44098.8286238988. The cubic root of 1944706686 is about 1248.2015065915.

The spelling of 1944706686 in words is "one billion, nine hundred forty-four million, seven hundred six thousand, six hundred eighty-six".