997755330 has 128 divisors (see below), whose sum is σ = 2978954496. Its totient is φ = 210124800.

The previous prime is 997755329. The next prime is 997755331. The reversal of 997755330 is 33557799.

997755330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (997755329) and next prime (997755331).

It is a super-3 number, since 3×997755330³ (a number of 28 digits) contains 333 as substring.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 997755330.

It is not an unprimeable number, because it can be changed into a prime (997755331) 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, 66090 + ... + 79770.

It is an arithmetic number, because the mean of its divisors is an integer number (23273082).

Almost surely, 2^997755330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997755330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1489477248).

997755330 is an abundant number, since it is smaller than the sum of its proper divisors (1981199166).

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

997755330 is a wasteful number, since it uses less digits than its factorization.

997755330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13732.

The product of its (nonzero) digits is 893025, while the sum is 48.

The square root of 997755330 is about 31587.2653137305. The cubic root of 997755330 is about 999.2512161293.

The spelling of 997755330 in words is "nine hundred ninety-seven million, seven hundred fifty-five thousand, three hundred thirty".