398290 has 8 divisors (see below), whose sum is σ = 716940. Its totient is φ = 159312.

The previous prime is 398287. The next prime is 398303. The reversal of 398290 is 92893.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 383161 + 15129 = 619^2 + 123^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19905 + ... + 19924.

2³⁹⁸²⁹⁰ is an apocalyptic number.

398290 is a deficient number, since it is larger than the sum of its proper divisors (318650).

398290 is a wasteful number, since it uses less digits than its factorization.

398290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39836.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 398290 is about 631.1022104224. The cubic root of 398290 is about 73.5754851010.

The spelling of 398290 in words is "three hundred ninety-eight thousand, two hundred ninety".