398220389 has 8 divisors (see below), whose sum is σ = 469790208. Its totient is φ = 330320880.

The previous prime is 398220379. The next prime is 398220419. The reversal of 398220389 is 983022893.

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

It is a cyclic number.

It is not a de Polignac number, because 398220389 - 2²⁰ = 397171813 is a prime.

It is a super-2 number, since 2×398220389² = 317158956430622642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398220349) 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, 917342 + ... + 917775.

It is an arithmetic number, because the mean of its divisors is an integer number (58723776).

Almost surely, 2^398220389 is an apocalyptic number.

It is an amenable number.

398220389 is a deficient number, since it is larger than the sum of its proper divisors (71569819).

398220389 is a wasteful number, since it uses less digits than its factorization.

398220389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835155.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 398220389 is about 19955.4601299995. The cubic root of 398220389 is about 735.7119847443.

The spelling of 398220389 in words is "three hundred ninety-eight million, two hundred twenty thousand, three hundred eighty-nine".