997338240 has 96 divisors (see below), whose sum is σ = 3443953500. Its totient is φ = 265955328.

The previous prime is 997338229. The next prime is 997338257. The reversal of 997338240 is 42833799.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 989983296 + 7354944 = 31464^2 + 2712^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80815 + ... + 92334.

Almost surely, 2^997338240 is an apocalyptic number.

997338240 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

997338240 is an abundant number, since it is smaller than the sum of its proper divisors (2446615260).

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

997338240 is a wasteful number, since it uses less digits than its factorization.

997338240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173174 (or 173159 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 997338240 is about 31580.6624376374. The cubic root of 997338240 is about 999.1119582820. Note that the first 3 decimals are identical.

It can be divided in two parts, 997338 and 240, that added together give a triangular number (997578 = T₁₄₁₂).

The spelling of 997338240 in words is "nine hundred ninety-seven million, three hundred thirty-eight thousand, two hundred forty".