997940832 has 48 divisors (see below), whose sum is σ = 2993824512. Its totient is φ = 285125760.

The previous prime is 997940831. The next prime is 997940863. The reversal of 997940832 is 238049799.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997940831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741844 + ... + 743187.

It is an arithmetic number, because the mean of its divisors is an integer number (62371344).

Almost surely, 2^997940832 is an apocalyptic number.

It is an amenable number.

997940832 is an abundant number, since it is smaller than the sum of its proper divisors (1995883680).

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

997940832 is a wasteful number, since it uses less digits than its factorization.

997940832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485051 (or 1485043 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 997940832 is about 31590.2015188254. The cubic root of 997940832 is about 999.3131389966.

The spelling of 997940832 in words is "nine hundred ninety-seven million, nine hundred forty thousand, eight hundred thirty-two".