997388744 has 32 divisors (see below), whose sum is σ = 2128818240. Its totient is φ = 433646400.

The previous prime is 997388731. The next prime is 997388747. The reversal of 997388744 is 447883799.

It is a super-3 number, since 3×997388744³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (997388747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244367 + ... + 248414.

It is an arithmetic number, because the mean of its divisors is an integer number (66525570).

Almost surely, 2^997388744 is an apocalyptic number.

It is an amenable number.

997388744 is an abundant number, since it is smaller than the sum of its proper divisors (1131429496).

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

997388744 is a wasteful number, since it uses less digits than its factorization.

997388744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492821 (or 492817 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 59.

The square root of 997388744 is about 31581.4620307547. The cubic root of 997388744 is about 999.1288226037.

The spelling of 997388744 in words is "nine hundred ninety-seven million, three hundred eighty-eight thousand, seven hundred forty-four".