397809705442 has 32 divisors (see below), whose sum is σ = 641602010880. Its totient is φ = 184393215360.

The previous prime is 397809705413. The next prime is 397809705443. The reversal of 397809705442 is 244507908793.

It is not an unprimeable number, because it can be changed into a prime (397809705443) 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, 11629428 + ... + 11663584.

It is an arithmetic number, because the mean of its divisors is an integer number (20050062840).

Almost surely, 2^397809705442 is an apocalyptic number.

397809705442 is a deficient number, since it is larger than the sum of its proper divisors (243792305438).

397809705442 is a wasteful number, since it uses less digits than its factorization.

397809705442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40746.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 397809705442 in words is "three hundred ninety-seven billion, eight hundred nine million, seven hundred five thousand, four hundred forty-two".