997569216 has 112 divisors (see below), whose sum is σ = 3351662080. Its totient is φ = 285016320.

The previous prime is 997569211. The next prime is 997569253. The reversal of 997569216 is 612965799.

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

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (997569211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29140 + ... + 53331.

Almost surely, 2^997569216 is an apocalyptic number.

997569216 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

997569216 is an abundant number, since it is smaller than the sum of its proper divisors (2354092864).

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

997569216 is a wasteful number, since it uses less digits than its factorization.

997569216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82499 (or 82483 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 997569216 is about 31584.3191473237. The cubic root of 997569216 is about 999.1890812552.

The spelling of 997569216 in words is "nine hundred ninety-seven million, five hundred sixty-nine thousand, two hundred sixteen".