1992018 has 32 divisors (see below), whose sum is σ = 4663296. Its totient is φ = 555408.

The previous prime is 1991999. The next prime is 1992031. The reversal of 1992018 is 8102991.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1255 + ... + 2357.

It is an arithmetic number, because the mean of its divisors is an integer number (145728).

2^1992018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1992018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2331648).

1992018 is an abundant number, since it is smaller than the sum of its proper divisors (2671278).

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

1992018 is a wasteful number, since it uses less digits than its factorization.

1992018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1992018 is about 1411.3886778630. The cubic root of 1992018 is about 125.8242700176.

The spelling of 1992018 in words is "one million, nine hundred ninety-two thousand, eighteen".