997229088 has 72 divisors (see below), whose sum is σ = 2840540976. Its totient is φ = 331862400.

The previous prime is 997229081. The next prime is 997229089. The reversal of 997229088 is 880922799.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (997229081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196503 + ... + 201513.

It is an arithmetic number, because the mean of its divisors is an integer number (39451958).

Almost surely, 2^997229088 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 997229088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1420270488).

997229088 is an abundant number, since it is smaller than the sum of its proper divisors (1843311888).

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

997229088 is a wasteful number, since it uses less digits than its factorization.

997229088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5718 (or 5707 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 997229088 is about 31578.9342442078. The cubic root of 997229088 is about 999.0755082450.

It can be divided in two parts, 9972 and 29088, that added together give a triangular number (39060 = T₂₇₉).

The spelling of 997229088 in words is "nine hundred ninety-seven million, two hundred twenty-nine thousand, eighty-eight".