398532555 has 40 divisors (see below), whose sum is σ = 718908432. Its totient is φ = 211211712.

The previous prime is 398532553. The next prime is 398532637. The reversal of 398532555 is 555235893.

398532555 is a `hidden beast` number, since 3 + 98 + 5 + 3 + 2 + 555 = 666.

It is not a de Polignac number, because 398532555 - 2¹ = 398532553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 398532555.

It is not an unprimeable number, because it can be changed into a prime (398532553) 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 39 ways as a sum of consecutive naturals, for example, 62997 + ... + 69033.

Almost surely, 2^398532555 is an apocalyptic number.

398532555 is a deficient number, since it is larger than the sum of its proper divisors (320375877).

398532555 is a wasteful number, since it uses less digits than its factorization.

398532555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6217 (or 6208 counting only the distinct ones).

The product of its digits is 810000, while the sum is 45.

The square root of 398532555 is about 19963.2801663454. The cubic root of 398532555 is about 735.9041767134.

The spelling of 398532555 in words is "three hundred ninety-eight million, five hundred thirty-two thousand, five hundred fifty-five".