997212580 has 96 divisors (see below), whose sum is σ = 2592656640. Its totient is φ = 313735680.

The previous prime is 997212569. The next prime is 997212581. The reversal of 997212580 is 85212799.

It is not an unprimeable number, because it can be changed into a prime (997212581) 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 31 ways as a sum of consecutive naturals, for example, 324250 + ... + 327310.

It is an arithmetic number, because the mean of its divisors is an integer number (27006840).

Almost surely, 2^997212580 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 997212580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296328320).

997212580 is an abundant number, since it is smaller than the sum of its proper divisors (1595444060).

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

997212580 is a wasteful number, since it uses less digits than its factorization.

997212580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3269 (or 3267 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 997212580 is about 31578.6728663508. The cubic root of 997212580 is about 999.0699953595.

The spelling of 997212580 in words is "nine hundred ninety-seven million, two hundred twelve thousand, five hundred eighty".