997731340 has 12 divisors (see below), whose sum is σ = 2095235856. Its totient is φ = 399092528.

The previous prime is 997731337. The next prime is 997731347. The reversal of 997731340 is 43137799.

It is not an unprimeable number, because it can be changed into a prime (997731347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24943264 + ... + 24943303.

It is an arithmetic number, because the mean of its divisors is an integer number (174602988).

Almost surely, 2^997731340 is an apocalyptic number.

It is an amenable number.

997731340 is an abundant number, since it is smaller than the sum of its proper divisors (1097504516).

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

997731340 is a wasteful number, since it uses less digits than its factorization.

997731340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49886576 (or 49886574 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 997731340 is about 31586.8855698057. The cubic root of 997731340 is about 999.2432074095.

The spelling of 997731340 in words is "nine hundred ninety-seven million, seven hundred thirty-one thousand, three hundred forty".