997185056 has 192 divisors, whose sum is σ = 2519838720. Its totient is φ = 378639360.

The previous prime is 997185023. The next prime is 997185073. The reversal of 997185056 is 650581799.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 997184995 and 997185013.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5971085 + ... + 5971251.

It is an arithmetic number, because the mean of its divisors is an integer number (13124160).

Almost surely, 2^997185056 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 997185056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259919360).

997185056 is an abundant number, since it is smaller than the sum of its proper divisors (1522653664).

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

997185056 is a wasteful number, since it uses less digits than its factorization.

997185056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 997185056 is about 31578.2370628887. The cubic root of 997185056 is about 999.0608035195.

The spelling of 997185056 in words is "nine hundred ninety-seven million, one hundred eighty-five thousand, fifty-six".