997984782 has 12 divisors (see below), whose sum is σ = 2162300400. Its totient is φ = 332661588.

The previous prime is 997984777. The next prime is 997984783. The reversal of 997984782 is 287489799.

997984782 is a `hidden beast` number, since 99 + 79 + 8 + 478 + 2 = 666.

997984782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997984783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27721782 + ... + 27721817.

It is an arithmetic number, because the mean of its divisors is an integer number (180191700).

Almost surely, 2^997984782 is an apocalyptic number.

997984782 is an abundant number, since it is smaller than the sum of its proper divisors (1164315618).

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

997984782 is a wasteful number, since it uses less digits than its factorization.

997984782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55443607 (or 55443604 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The square root of 997984782 is about 31590.8971382580. The cubic root of 997984782 is about 999.3278089271.

The spelling of 997984782 in words is "nine hundred ninety-seven million, nine hundred eighty-four thousand, seven hundred eighty-two".