398420558 has 8 divisors (see below), whose sum is σ = 603548280. Its totient is φ = 197237800.

The previous prime is 398420543. The next prime is 398420567. The reversal of 398420558 is 855024893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×398420558³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 985988 + ... + 986391.

It is an arithmetic number, because the mean of its divisors is an integer number (75443535).

Almost surely, 2^398420558 is an apocalyptic number.

398420558 is a deficient number, since it is larger than the sum of its proper divisors (205127722).

398420558 is a wasteful number, since it uses less digits than its factorization.

398420558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972482.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 398420558 is about 19960.4748941502. The cubic root of 398420558 is about 735.8352348074.

It can be divided in two parts, 3984 and 20558, that added together give a palindrome (24542).

The spelling of 398420558 in words is "three hundred ninety-eight million, four hundred twenty thousand, five hundred fifty-eight".