997485888 has 112 divisors (see below), whose sum is σ = 3080577024. Its totient is φ = 278914560.

The previous prime is 997485871. The next prime is 997485899. The reversal of 997485888 is 888584799.

997485888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 31583²-1.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55273 + ... + 71063.

It is an arithmetic number, because the mean of its divisors is an integer number (27505152).

Almost surely, 2^997485888 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 997485888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1540288512).

997485888 is an abundant number, since it is smaller than the sum of its proper divisors (2083091136).

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

997485888 is a wasteful number, since it uses less digits than its factorization.

997485888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15860 (or 15850 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 66.

The square root of 997485888 is about 31582.9999841687. Note that the first 4 decimals coincide. The cubic root of 997485888 is about 999.1612593775.

The spelling of 997485888 in words is "nine hundred ninety-seven million, four hundred eighty-five thousand, eight hundred eighty-eight".