13988533 has 16 divisors (see below), whose sum is σ = 15748096. Its totient is φ = 12337920.

The previous prime is 13988521. The next prime is 13988537. The reversal of 13988533 is 33588931.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13988533 - 2⁹ = 13988021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13988537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41341 + ... + 41677.

It is an arithmetic number, because the mean of its divisors is an integer number (984256).

Almost surely, 2^13988533 is an apocalyptic number.

13988533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13988533 is a deficient number, since it is larger than the sum of its proper divisors (1759563).

13988533 is a wasteful number, since it uses less digits than its factorization.

13988533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484.

The product of its digits is 77760, while the sum is 40.

The square root of 13988533 is about 3740.1247305404. The cubic root of 13988533 is about 240.9484058214.

The spelling of 13988533 in words is "thirteen million, nine hundred eighty-eight thousand, five hundred thirty-three".