298639 has 8 divisors (see below), whose sum is σ = 345168. Its totient is φ = 255360.

The previous prime is 298631. The next prime is 298651. The reversal of 298639 is 936892.

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

It is a cyclic number.

It is not a de Polignac number, because 298639 - 2³ = 298631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 298598 and 298607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298631) 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, 612 + ... + 985.

It is an arithmetic number, because the mean of its divisors is an integer number (43146).

298639 is a Friedman number, since it can be written as (26^3-9)*(9+8), using all its digits and the basic arithmetic operations.

2²⁹⁸⁶³⁹ is an apocalyptic number.

298639 is a deficient number, since it is larger than the sum of its proper divisors (46529).

298639 is a wasteful number, since it uses less digits than its factorization.

298639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625.

The product of its digits is 23328, while the sum is 37.

The square root of 298639 is about 546.4787278568. The cubic root of 298639 is about 66.8419083959.

It can be divided in two parts, 2986 and 39, that added together give a square (3025 = 55²).

The spelling of 298639 in words is "two hundred ninety-eight thousand, six hundred thirty-nine".