1997748 has 36 divisors (see below), whose sum is σ = 5093088. Its totient is φ = 660240.

The previous prime is 1997747. The next prime is 1997753. The reversal of 1997748 is 8477991.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7465 + ... + 7727.

2^1997748 is an apocalyptic number.

1997748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1997748 is an abundant number, since it is smaller than the sum of its proper divisors (3095340).

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

1997748 is a wasteful number, since it uses less digits than its factorization.

1997748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 479 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1997748 is about 1413.4171358803. The cubic root of 1997748 is about 125.9447981925.

The spelling of 1997748 in words is "one million, nine hundred ninety-seven thousand, seven hundred forty-eight".