997637232 has 40 divisors (see below), whose sum is σ = 2625863184. Its totient is φ = 326270464.

The previous prime is 997637209. The next prime is 997637233. The reversal of 997637232 is 232736799.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997637233) 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, 193533 + ... + 198620.

Almost surely, 2^997637232 is an apocalyptic number.

It is an amenable number.

997637232 is an abundant number, since it is smaller than the sum of its proper divisors (1628225952).

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

997637232 is a wasteful number, since it uses less digits than its factorization.

997637232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392217 (or 392211 counting only the distinct ones).

The product of its digits is 857304, while the sum is 48.

The square root of 997637232 is about 31585.3958658111. The cubic root of 997637232 is about 999.2117895542.

The spelling of 997637232 in words is "nine hundred ninety-seven million, six hundred thirty-seven thousand, two hundred thirty-two".