398915 has 8 divisors (see below), whose sum is σ = 522288. Its totient is φ = 290080.

The previous prime is 398903. The next prime is 398917. The reversal of 398915 is 519893.

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

It is not a de Polignac number, because 398915 - 2¹² = 394819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398917) 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, 3572 + ... + 3681.

It is an arithmetic number, because the mean of its divisors is an integer number (65286).

2³⁹⁸⁹¹⁵ is an apocalyptic number.

398915 is a deficient number, since it is larger than the sum of its proper divisors (123373).

398915 is a wasteful number, since it uses less digits than its factorization.

398915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7269.

The product of its digits is 9720, while the sum is 35.

The square root of 398915 is about 631.5971817543. The cubic root of 398915 is about 73.6139500771.

It can be divided in two parts, 3989 and 15, that added together give a palindrome (4004).

The spelling of 398915 in words is "three hundred ninety-eight thousand, nine hundred fifteen".