398216469 has 8 divisors (see below), whose sum is σ = 606806080. Its totient is φ = 227552256.

The previous prime is 398216419. The next prime is 398216521. The reversal of 398216469 is 964612893.

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

It is not a de Polignac number, because 398216469 - 2¹⁶ = 398150933 is a prime.

It is a super-2 number, since 2×398216469² = 317152712365655922, 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 (398216419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9481324 + ... + 9481365.

It is an arithmetic number, because the mean of its divisors is an integer number (75850760).

Almost surely, 2^398216469 is an apocalyptic number.

It is an amenable number.

398216469 is a deficient number, since it is larger than the sum of its proper divisors (208589611).

398216469 is a wasteful number, since it uses less digits than its factorization.

398216469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18962699.

The product of its digits is 559872, while the sum is 48.

The square root of 398216469 is about 19955.3619110253. The cubic root of 398216469 is about 735.7095706703.

The spelling of 398216469 in words is "three hundred ninety-eight million, two hundred sixteen thousand, four hundred sixty-nine".