1920729366 has 12 divisors (see below), whose sum is σ = 4161580332. Its totient is φ = 640243116.

The previous prime is 1920729359. The next prime is 1920729367. The reversal of 1920729366 is 6639270291.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920729367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53353576 + ... + 53353611.

It is an arithmetic number, because the mean of its divisors is an integer number (346798361).

Almost surely, 2^1920729366 is an apocalyptic number.

1920729366 is an abundant number, since it is smaller than the sum of its proper divisors (2240850966).

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

1920729366 is a wasteful number, since it uses less digits than its factorization.

1920729366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106707195 (or 106707192 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 1920729366 is about 43826.1265228859. The cubic root of 1920729366 is about 1243.0503650781.

The spelling of 1920729366 in words is "one billion, nine hundred twenty million, seven hundred twenty-nine thousand, three hundred sixty-six".