398515 has 8 divisors (see below), whose sum is σ = 515088. Its totient is φ = 294240.

The previous prime is 398509. The next prime is 398539. The reversal of 398515 is 515893.

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

It is not a de Polignac number, because 398515 - 2¹³ = 390323 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3001 + ... + 3130.

It is an arithmetic number, because the mean of its divisors is an integer number (64386).

2³⁹⁸⁵¹⁵ is an apocalyptic number.

398515 is a deficient number, since it is larger than the sum of its proper divisors (116573).

398515 is a wasteful number, since it uses less digits than its factorization.

398515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6149.

The product of its digits is 5400, while the sum is 31.

The square root of 398515 is about 631.2804448104. The cubic root of 398515 is about 73.5893371249.

The spelling of 398515 in words is "three hundred ninety-eight thousand, five hundred fifteen".