9805438401 has 16 divisors (see below), whose sum is σ = 14380333248. Its totient is φ = 5942687520.

The previous prime is 9805438399. The next prime is 9805438439. The reversal of 9805438401 is 1048345089.

It is not a de Polignac number, because 9805438401 - 2¹ = 9805438399 is a prime.

It is a super-2 number, since 2×9805438401² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9805438481) 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, 1223836 + ... + 1231821.

It is an arithmetic number, because the mean of its divisors is an integer number (898770828).

Almost surely, 2^9805438401 is an apocalyptic number.

It is an amenable number.

9805438401 is a deficient number, since it is larger than the sum of its proper divisors (4574894847).

9805438401 is a wasteful number, since it uses less digits than its factorization.

9805438401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455693 (or 2455671 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 9805438401 is about 99022.4136294405. The cubic root of 9805438401 is about 2140.3707396959.

The spelling of 9805438401 in words is "nine billion, eight hundred five million, four hundred thirty-eight thousand, four hundred one".