398648555 has 16 divisors (see below), whose sum is σ = 510520320. Its totient is φ = 297787392.

The previous prime is 398648527. The next prime is 398648567. The reversal of 398648555 is 555846893.

It is a cyclic number.

It is not a de Polignac number, because 398648555 - 2¹⁶ = 398583019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398648497 and 398648506.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7670 + ... + 29259.

It is an arithmetic number, because the mean of its divisors is an integer number (31907520).

Almost surely, 2^398648555 is an apocalyptic number.

398648555 is a deficient number, since it is larger than the sum of its proper divisors (111871765).

398648555 is a wasteful number, since it uses less digits than its factorization.

398648555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37078.

The product of its digits is 5184000, while the sum is 53.

The square root of 398648555 is about 19966.1852891332. The cubic root of 398648555 is about 735.9755691274.

The spelling of 398648555 in words is "three hundred ninety-eight million, six hundred forty-eight thousand, five hundred fifty-five".