997357308 has 48 divisors (see below), whose sum is σ = 2439419136. Its totient is φ = 316794240.

The previous prime is 997357307. The next prime is 997357321. The reversal of 997357308 is 803753799.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997357301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2416 + ... + 44727.

It is an arithmetic number, because the mean of its divisors is an integer number (50821232).

Almost surely, 2^997357308 is an apocalyptic number.

It is an amenable number.

997357308 is an abundant number, since it is smaller than the sum of its proper divisors (1442061828).

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

997357308 is a wasteful number, since it uses less digits than its factorization.

997357308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47234 (or 47232 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 51.

The square root of 997357308 is about 31580.9643297984. The cubic root of 997357308 is about 999.1183255453.

The spelling of 997357308 in words is "nine hundred ninety-seven million, three hundred fifty-seven thousand, three hundred eight".