398655543 has 32 divisors (see below), whose sum is σ = 626879232. Its totient is φ = 222163200.

The previous prime is 398655541. The next prime is 398655563. The reversal of 398655543 is 345556893.

It is not a de Polignac number, because 398655543 - 2¹ = 398655541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398655492 and 398655501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398655541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118896 + ... + 122202.

It is an arithmetic number, because the mean of its divisors is an integer number (19589976).

Almost surely, 2^398655543 is an apocalyptic number.

398655543 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

398655543 is a deficient number, since it is larger than the sum of its proper divisors (228223689).

398655543 is a wasteful number, since it uses less digits than its factorization.

398655543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3615.

The product of its digits is 1944000, while the sum is 48.

The square root of 398655543 is about 19966.3602842381. The cubic root of 398655543 is about 735.9798694626.

The spelling of 398655543 in words is "three hundred ninety-eight million, six hundred fifty-five thousand, five hundred forty-three".