13988205 has 72 divisors (see below), whose sum is σ = 30541056. Its totient is φ = 5797440.

The previous prime is 13988203. The next prime is 13988213. The reversal of 13988205 is 50288931.

It is not a de Polignac number, because 13988205 - 2¹ = 13988203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13988205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13988203) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 37932 + ... + 38298.

Almost surely, 2^13988205 is an apocalyptic number.

13988205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13988205 is an abundant number, since it is smaller than the sum of its proper divisors (16552851).

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

13988205 is a wasteful number, since it uses less digits than its factorization.

13988205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 13988205 is about 3740.0808814784. The cubic root of 13988205 is about 240.9465225719.

The spelling of 13988205 in words is "thirteen million, nine hundred eighty-eight thousand, two hundred five".