398279 has 4 divisors (see below), whose sum is σ = 455184. Its totient is φ = 341376.

The previous prime is 398273. The next prime is 398287. The reversal of 398279 is 972893.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 398279 - 2⁸ = 398023 is a prime.

It is a pancake number, because a pancake can be divided into 398279 parts by 892 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398273) 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, 28442 + ... + 28455.

It is an arithmetic number, because the mean of its divisors is an integer number (113796).

2³⁹⁸²⁷⁹ is an apocalyptic number.

398279 is a deficient number, since it is larger than the sum of its proper divisors (56905).

398279 is an equidigital number, since it uses as much as digits as its factorization.

398279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56904.

The product of its digits is 27216, while the sum is 38.

The square root of 398279 is about 631.0934954506. The cubic root of 398279 is about 73.5748077572.

The spelling of 398279 in words is "three hundred ninety-eight thousand, two hundred seventy-nine".