398538569 has 16 divisors (see below), whose sum is σ = 476159040. Its totient is φ = 328762560.

The previous prime is 398538563. The next prime is 398538571. The reversal of 398538569 is 965835893.

It is a cyclic number.

It is not a de Polignac number, because 398538569 - 2⁸ = 398538313 is a prime.

It is a super-2 number, since 2×398538569² = 317665981961135522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398538563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15182 + ... + 32055.

It is an arithmetic number, because the mean of its divisors is an integer number (29759940).

Almost surely, 2^398538569 is an apocalyptic number.

It is an amenable number.

398538569 is a deficient number, since it is larger than the sum of its proper divisors (77620471).

398538569 is a wasteful number, since it uses less digits than its factorization.

398538569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47320.

The product of its digits is 6998400, while the sum is 56.

The square root of 398538569 is about 19963.4307923263. The cubic root of 398538569 is about 735.9078783812.

The spelling of 398538569 in words is "three hundred ninety-eight million, five hundred thirty-eight thousand, five hundred sixty-nine".