997667260 has 48 divisors (see below), whose sum is σ = 2161111680. Its totient is φ = 386588160.

The previous prime is 997667239. The next prime is 997667267. The reversal of 997667260 is 62766799.

It is a junction number, because it is equal to n+sod(n) for n = 997667198 and 997667207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997667267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174040 + ... + 179680.

It is an arithmetic number, because the mean of its divisors is an integer number (45023160).

Almost surely, 2^997667260 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 997667260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080555840).

997667260 is an abundant number, since it is smaller than the sum of its proper divisors (1163444420).

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

997667260 is a wasteful number, since it uses less digits than its factorization.

997667260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926 (or 5924 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 52.

The square root of 997667260 is about 31585.8712085008. The cubic root of 997667260 is about 999.2218145845.

The spelling of 997667260 in words is "nine hundred ninety-seven million, six hundred sixty-seven thousand, two hundred sixty".