13998258 has 28 divisors (see below), whose sum is σ = 31484958. Its totient is φ = 4665600.

The previous prime is 13998251. The next prime is 13998301. The reversal of 13998258 is 85289931.

It is a happy number.

13998258 is a `hidden beast` number, since 1 + 399 + 8 + 258 = 666.

13998258 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10323369 + 3674889 = 3213^2 + 1917^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13998251) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 3343 + ... + 6258.

Almost surely, 2^13998258 is an apocalyptic number.

13998258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13998258 is an abundant number, since it is smaller than the sum of its proper divisors (17486700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13998258 is an frugal number, since it uses more digits than its factorization.

13998258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9621 (or 9606 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 13998258 is about 3741.4245949905. The cubic root of 13998258 is about 241.0042296509.

The spelling of 13998258 in words is "thirteen million, nine hundred ninety-eight thousand, two hundred fifty-eight".