997144632 has 96 divisors (see below), whose sum is σ = 2956852080. Its totient is φ = 301063680.

The previous prime is 997144607. The next prime is 997144637. The reversal of 997144632 is 236441799.

It is a happy number.

997144632 is a `hidden beast` number, since 9 + 9 + 7 + 1 + 4 + 4 + 632 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997144637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229908 + ... + 234204.

Almost surely, 2^997144632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997144632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478426040).

997144632 is an abundant number, since it is smaller than the sum of its proper divisors (1959707448).

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

997144632 is a wasteful number, since it uses less digits than its factorization.

997144632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4613 (or 4606 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 997144632 is about 31577.5969953383. The cubic root of 997144632 is about 999.0473033239.

The spelling of 997144632 in words is "nine hundred ninety-seven million, one hundred forty-four thousand, six hundred thirty-two".