398554 has 8 divisors (see below), whose sum is σ = 643860. Its totient is φ = 183936.

The previous prime is 398549. The next prime is 398557. The reversal of 398554 is 455893.

It can be written as a sum of positive squares in 2 ways, for example, as 328329 + 70225 = 573^2 + 265^2 .

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

It is not an unprimeable number, because it can be changed into a prime (398557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7639 + ... + 7690.

2³⁹⁸⁵⁵⁴ is an apocalyptic number.

398554 is a deficient number, since it is larger than the sum of its proper divisors (245306).

398554 is a wasteful number, since it uses less digits than its factorization.

398554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15344.

The product of its digits is 21600, while the sum is 34.

The square root of 398554 is about 631.3113336540. The cubic root of 398554 is about 73.5917376122.

The spelling of 398554 in words is "three hundred ninety-eight thousand, five hundred fifty-four".