997240818 has 16 divisors (see below), whose sum is σ = 2279407680. Its totient is φ = 284925936.

The previous prime is 997240793. The next prime is 997240819. The reversal of 997240818 is 818042799.

It is not an unprimeable number, because it can be changed into a prime (997240819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11871873 + ... + 11871956.

It is an arithmetic number, because the mean of its divisors is an integer number (142462980).

Almost surely, 2^997240818 is an apocalyptic number.

997240818 is an abundant number, since it is smaller than the sum of its proper divisors (1282166862).

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

997240818 is a wasteful number, since it uses less digits than its factorization.

997240818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23743841.

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 997240818 is about 31579.1199687388. The cubic root of 997240818 is about 999.0794254692.

The spelling of 997240818 in words is "nine hundred ninety-seven million, two hundred forty thousand, eight hundred eighteen".