13989858 has 16 divisors (see below), whose sum is σ = 28032480. Its totient is φ = 4654496.

The previous prime is 13989853. The next prime is 13989863. The reversal of 13989858 is 85898931.

It is an interprime number because it is at equal distance from previous prime (13989853) and next prime (13989863).

It is a super-2 number, since 2×13989858² = 391432253720328, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13989858.

It is not an unprimeable number, because it can be changed into a prime (13989853) 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, 1813 + ... + 5591.

It is an arithmetic number, because the mean of its divisors is an integer number (1752030).

Almost surely, 2^13989858 is an apocalyptic number.

13989858 is an abundant number, since it is smaller than the sum of its proper divisors (14042622).

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

13989858 is a wasteful number, since it uses less digits than its factorization.

13989858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401.

The product of its digits is 622080, while the sum is 51.

The square root of 13989858 is about 3740.3018594761. The cubic root of 13989858 is about 240.9560131609.

The spelling of 13989858 in words is "thirteen million, nine hundred eighty-nine thousand, eight hundred fifty-eight".