398536622064 has 320 divisors, whose sum is σ = 1329598233600. Its totient is φ = 111938568192.

The previous prime is 398536622039. The next prime is 398536622093. The reversal of 398536622064 is 460226635893.

It is a happy number.

398536622064 is a `hidden beast` number, since 3 + 9 + 8 + 5 + 3 + 6 + 622 + 0 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 398536622064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115282224 + ... + 115285680.

It is an arithmetic number, because the mean of its divisors is an integer number (4154994480).

Almost surely, 2^398536622064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398536622064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (664799116800).

398536622064 is an abundant number, since it is smaller than the sum of its proper divisors (931061611536).

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

398536622064 is a wasteful number, since it uses less digits than its factorization.

398536622064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117 (or 4105 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 54.

The spelling of 398536622064 in words is "three hundred ninety-eight billion, five hundred thirty-six million, six hundred twenty-two thousand, sixty-four".