1997802 has 12 divisors (see below), whose sum is σ = 4328610. Its totient is φ = 665928.

The previous prime is 1997773. The next prime is 1997813. The reversal of 1997802 is 2087991.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1058841 + 938961 = 1029^2 + 969^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55477 + ... + 55512.

2^1997802 is an apocalyptic number.

1997802 is an abundant number, since it is smaller than the sum of its proper divisors (2330808).

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

1997802 is a wasteful number, since it uses less digits than its factorization.

1997802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110997 (or 110994 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1997802 is about 1413.4362383921. The cubic root of 1997802 is about 125.9459329632.

It can be divided in two parts, 199 and 7802, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 1997802 in words is "one million, nine hundred ninety-seven thousand, eight hundred two".