1997892 has 48 divisors (see below), whose sum is σ = 5582080. Its totient is φ = 614304.

The previous prime is 1997887. The next prime is 1997899. The reversal of 1997892 is 2987991.

It is not an unprimeable number, because it can be changed into a prime (1997899) 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 15 ways as a sum of consecutive naturals, for example, 693 + ... + 2115.

2^1997892 is an apocalyptic number.

1997892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2791040).

1997892 is an abundant number, since it is smaller than the sum of its proper divisors (3584188).

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

1997892 is a wasteful number, since it uses less digits than its factorization.

1997892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449 (or 1441 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 1997892 is about 1413.4680753381. The cubic root of 1997892 is about 125.9478242023.

Subtracting 1997892 from its reverse (2987991), we obtain a palindrome (990099).

The spelling of 1997892 in words is "one million, nine hundred ninety-seven thousand, eight hundred ninety-two".