1997208 has 24 divisors (see below), whose sum is σ = 5409300. Its totient is φ = 665712.

The previous prime is 1997189. The next prime is 1997213. The reversal of 1997208 is 8027991.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent 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, 13798 + ... + 13941.

2^1997208 is an apocalyptic number.

1997208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1997208 is an abundant number, since it is smaller than the sum of its proper divisors (3412092).

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

1997208 is a wasteful number, since it uses less digits than its factorization.

1997208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27751 (or 27744 counting only the distinct ones).

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

The square root of 1997208 is about 1413.2260965606. The cubic root of 1997208 is about 125.9334493604.

The spelling of 1997208 in words is "one million, nine hundred ninety-seven thousand, two hundred eight".