1920208964 has 12 divisors (see below), whose sum is σ = 3391195500. Its totient is φ = 951295968.

The previous prime is 1920208963. The next prime is 1920209003. The reversal of 1920208964 is 4698020291.

It can be written as a sum of positive squares in 2 ways, for example, as 681732100 + 1238476864 = 26110^2 + 35192^2 .

It is not an unprimeable number, because it can be changed into a prime (1920208963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2201639 + ... + 2202510.

It is an arithmetic number, because the mean of its divisors is an integer number (282599625).

Almost surely, 2^1920208964 is an apocalyptic number.

It is an amenable number.

1920208964 is a deficient number, since it is larger than the sum of its proper divisors (1470986536).

1920208964 is a wasteful number, since it uses less digits than its factorization.

1920208964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404262 (or 4404260 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1920208964 is about 43820.1890000488. The cubic root of 1920208964 is about 1242.9380910051.

The spelling of 1920208964 in words is "one billion, nine hundred twenty million, two hundred eight thousand, nine hundred sixty-four".