997236576 has 384 divisors, whose sum is σ = 3553320960. Its totient is φ = 265959936.

The previous prime is 997236557. The next prime is 997236577. The reversal of 997236576 is 675632799.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997236577) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9319915 + ... + 9320021.

It is an arithmetic number, because the mean of its divisors is an integer number (9253440).

Almost surely, 2^997236576 is an apocalyptic number.

997236576 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997236576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1776660480).

997236576 is an abundant number, since it is smaller than the sum of its proper divisors (2556084384).

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

997236576 is a wasteful number, since it uses less digits than its factorization.

997236576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 209 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The square root of 997236576 is about 31579.0528040345. The cubic root of 997236576 is about 999.0780088603.

The spelling of 997236576 in words is "nine hundred ninety-seven million, two hundred thirty-six thousand, five hundred seventy-six".