398115055552 has 56 divisors (see below), whose sum is σ = 810933756336. Its totient is φ = 193814519808.

The previous prime is 398115055489. The next prime is 398115055553. The reversal of 398115055552 is 255550511893.

It is a junction number, because it is equal to n+sod(n) for n = 398115055496 and 398115055505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398115055553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644208 + ... + 1100560.

Almost surely, 2^398115055552 is an apocalyptic number.

398115055552 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398115055552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405466878168).

398115055552 is an abundant number, since it is smaller than the sum of its proper divisors (412818700784).

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

398115055552 is a wasteful number, since it uses less digits than its factorization.

398115055552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456725 (or 456715 counting only the distinct ones).

The product of its (nonzero) digits is 1350000, while the sum is 49.

The spelling of 398115055552 in words is "three hundred ninety-eight billion, one hundred fifteen million, fifty-five thousand, five hundred fifty-two".