398362638805 has 16 divisors (see below), whose sum is σ = 483273423360. Its totient is φ = 315205596288.

The previous prime is 398362638803. The next prime is 398362638823. The reversal of 398362638805 is 508836263893.

It is a cyclic number.

It is not a de Polignac number, because 398362638805 - 2¹ = 398362638803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398362638803) 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 15 ways as a sum of consecutive naturals, for example, 61437 + ... + 894706.

It is an arithmetic number, because the mean of its divisors is an integer number (30204588960).

Almost surely, 2^398362638805 is an apocalyptic number.

It is an amenable number.

398362638805 is a deficient number, since it is larger than the sum of its proper divisors (84910784555).

398362638805 is a wasteful number, since it uses less digits than its factorization.

398362638805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957060.

The product of its (nonzero) digits is 44789760, while the sum is 61.

The spelling of 398362638805 in words is "three hundred ninety-eight billion, three hundred sixty-two million, six hundred thirty-eight thousand, eight hundred five".