398170 has 16 divisors (see below), whose sum is σ = 741960. Its totient is φ = 153664.

The previous prime is 398149. The next prime is 398171. The reversal of 398170 is 71893.

398170 = T₁₅₁ + T₁₅₂ + ... + T₁₇₉.

It can be written as a sum of positive squares in 4 ways, for example, as 393129 + 5041 = 627^2 + 71^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398171) 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, 397 + ... + 976.

2³⁹⁸¹⁷⁰ is an apocalyptic number.

398170 is a deficient number, since it is larger than the sum of its proper divisors (343790).

398170 is a wasteful number, since it uses less digits than its factorization.

398170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 398170 is about 631.0071314969. The cubic root of 398170 is about 73.5680952217.

The spelling of 398170 in words is "three hundred ninety-eight thousand, one hundred seventy".