398236000000 has 126 divisors (see below), whose sum is σ = 993642749960. Its totient is φ = 159292800000.

The previous prime is 398235999989. The next prime is 398236000007. The reversal of 398236000000 is 632893.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398236000007) 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 13 ways as a sum of consecutive naturals, for example, 3950221 + ... + 4049779.

Almost surely, 2^398236000000 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 398236000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496821374980).

398236000000 is an abundant number, since it is smaller than the sum of its proper divisors (595406749960).

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

398236000000 is an frugal number, since it uses more digits than its factorization.

398236000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99605 (or 99566 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 398236000000 its reverse (632893), we get a palindrome (398236632893).

The spelling of 398236000000 in words is "three hundred ninety-eight billion, two hundred thirty-six million", and thus it is an aban number.