997042572 has 72 divisors (see below), whose sum is σ = 2588105520. Its totient is φ = 323506560.

The previous prime is 997042561. The next prime is 997042573. The reversal of 997042572 is 275240799.

997042572 is a `hidden beast` number, since 9 + 9 + 70 + 4 + 2 + 572 = 666.

It is not an unprimeable number, because it can be changed into a prime (997042573) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 247954 + ... + 251942.

It is an arithmetic number, because the mean of its divisors is an integer number (35945910).

Almost surely, 2^997042572 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 997042572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1294052760).

997042572 is an abundant number, since it is smaller than the sum of its proper divisors (1591062948).

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

997042572 is a wasteful number, since it uses less digits than its factorization.

997042572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183 (or 4178 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 997042572 is about 31575.9809348815. The cubic root of 997042572 is about 999.0132172468.

The spelling of 997042572 in words is "nine hundred ninety-seven million, forty-two thousand, five hundred seventy-two".