1997432 has 32 divisors (see below), whose sum is σ = 4179600. Its totient is φ = 889344.

The previous prime is 1997431. The next prime is 1997441. The reversal of 1997432 is 2347991.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1997392 and 1997401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997431) 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 7 ways as a sum of consecutive naturals, for example, 2198 + ... + 2970.

2^1997432 is an apocalyptic number.

It is an amenable number.

1997432 is an abundant number, since it is smaller than the sum of its proper divisors (2182168).

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

1997432 is a wasteful number, since it uses less digits than its factorization.

1997432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815 (or 811 counting only the distinct ones).

The product of its digits is 13608, while the sum is 35.

The square root of 1997432 is about 1413.3053456348. The cubic root of 1997432 is about 125.9381572723.

The spelling of 1997432 in words is "one million, nine hundred ninety-seven thousand, four hundred thirty-two".