1997181832 has 32 divisors (see below), whose sum is σ = 3839635800. Its totient is φ = 973324800.

The previous prime is 1997181829. The next prime is 1997181833. The reversal of 1997181832 is 2381817991.

It can be written as a sum of positive squares in 4 ways, for example, as 1293553156 + 703628676 = 35966^2 + 26526^2 .

It is not an unprimeable number, because it can be changed into a prime (1997181833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466582 + ... + 470842.

Almost surely, 2^1997181832 is an apocalyptic number.

It is an amenable number.

1997181832 is a deficient number, since it is larger than the sum of its proper divisors (1842453968).

1997181832 is a wasteful number, since it uses less digits than its factorization.

1997181832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5737 (or 5733 counting only the distinct ones).

The product of its digits is 217728, while the sum is 49.

The square root of 1997181832 is about 44689.8403666874. The cubic root of 1997181832 is about 1259.3289935245.

The spelling of 1997181832 in words is "one billion, nine hundred ninety-seven million, one hundred eighty-one thousand, eight hundred thirty-two".