1944064686 has 32 divisors (see below), whose sum is σ = 4120272000. Its totient is φ = 609789600.

The previous prime is 1944064663. The next prime is 1944064687. The reversal of 1944064686 is 6864604491.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944064687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40240 + ... + 74211.

It is an arithmetic number, because the mean of its divisors is an integer number (128758500).

Almost surely, 2^1944064686 is an apocalyptic number.

1944064686 is an abundant number, since it is smaller than the sum of its proper divisors (2176207314).

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

1944064686 is a wasteful number, since it uses less digits than its factorization.

1944064686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114624.

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 1944064686 is about 44091.5489181317. The cubic root of 1944064686 is about 1248.0641365070.

The spelling of 1944064686 in words is "one billion, nine hundred forty-four million, sixty-four thousand, six hundred eighty-six".