1997884 has 12 divisors (see below), whose sum is σ = 3995824. Its totient is φ = 856224.

The previous prime is 1997867. The next prime is 1997887. The reversal of 1997884 is 4887991.

It is a happy number.

1997884 is nontrivially palindromic in base 3.

1997884 is an admirable number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35649 + ... + 35704.

2^1997884 is an apocalyptic number.

1997884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1997884 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1997884 is a wasteful number, since it uses less digits than its factorization.

1997884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71364 (or 71362 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 1997884 is about 1413.4652454164. The cubic root of 1997884 is about 125.9476560945.

It can be divided in two parts, 19 and 97884, that added together give a triangular number (97903 = T₄₄₂).

The spelling of 1997884 in words is "one million, nine hundred ninety-seven thousand, eight hundred eighty-four".