1992864 has 24 divisors (see below), whose sum is σ = 5231520. Its totient is φ = 664256.

The previous prime is 1992841. The next prime is 1992877. The reversal of 1992864 is 4682991.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10284 + ... + 10475.

It is an arithmetic number, because the mean of its divisors is an integer number (217980).

2^1992864 is an apocalyptic number.

It is an amenable number.

1992864 is an abundant number, since it is smaller than the sum of its proper divisors (3238656).

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

1992864 is a wasteful number, since it uses less digits than its factorization.

1992864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20772 (or 20764 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 1992864 is about 1411.6883508764. The cubic root of 1992864 is about 125.8420798076.

The spelling of 1992864 in words is "one million, nine hundred ninety-two thousand, eight hundred sixty-four".