1997826 has 32 divisors (see below), whose sum is σ = 4313088. Its totient is φ = 615120.

The previous prime is 1997813. The next prime is 1997833. The reversal of 1997826 is 6287991.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4045 + ... + 4511.

It is an arithmetic number, because the mean of its divisors is an integer number (134784).

2^1997826 is an apocalyptic number.

1997826 is an abundant number, since it is smaller than the sum of its proper divisors (2315262).

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

1997826 is a wasteful number, since it uses less digits than its factorization.

1997826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526.

The product of its digits is 54432, while the sum is 42.

The square root of 1997826 is about 1413.4447283145. Note that the first 3 decimals coincide. The cubic root of 1997826 is about 125.9464372992.

The spelling of 1997826 in words is "one million, nine hundred ninety-seven thousand, eight hundred twenty-six".