1997776 has 20 divisors (see below), whose sum is σ = 4222944. Its totient is φ = 908000.

The previous prime is 1997773. The next prime is 1997813. The reversal of 1997776 is 6777991.

It is a super-2 number, since 2×1997776² = 7982217892352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997771) 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, 5500 + ... + 5851.

2^1997776 is an apocalyptic number.

1997776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1997776 is an abundant number, since it is smaller than the sum of its proper divisors (2225168).

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

1997776 is a wasteful number, since it uses less digits than its factorization.

1997776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11370 (or 11364 counting only the distinct ones).

The product of its digits is 166698, while the sum is 46.

The square root of 1997776 is about 1413.4270409186. The cubic root of 1997776 is about 125.9453865947.

The spelling of 1997776 in words is "one million, nine hundred ninety-seven thousand, seven hundred seventy-six".