1992643842 has 32 divisors (see below), whose sum is σ = 4579795584. Its totient is φ = 566179200.

The previous prime is 1992643841. The next prime is 1992643879. The reversal of 1992643842 is 2483462991.

It is a junction number, because it is equal to n+sod(n) for n = 1992643791 and 1992643800.

It is not an unprimeable number, because it can be changed into a prime (1992643841) 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, 123459 + ... + 138662.

It is an arithmetic number, because the mean of its divisors is an integer number (143118612).

Almost surely, 2^1992643842 is an apocalyptic number.

1992643842 is an abundant number, since it is smaller than the sum of its proper divisors (2587151742).

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

1992643842 is a wasteful number, since it uses less digits than its factorization.

1992643842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262314.

The product of its digits is 746496, while the sum is 48.

The square root of 1992643842 is about 44639.0394385901. The cubic root of 1992643842 is about 1258.3744557920.

The spelling of 1992643842 in words is "one billion, nine hundred ninety-two million, six hundred forty-three thousand, eight hundred forty-two".