13888481 has 4 divisors (see below), whose sum is σ = 14492352. Its totient is φ = 13284612.

The previous prime is 13888471. The next prime is 13888499. The reversal of 13888481 is 18488831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13888481 is a prime.

It is a super-2 number, since 2×13888481² = 385779808974722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13888421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301901 + ... + 301946.

It is an arithmetic number, because the mean of its divisors is an integer number (3623088).

Almost surely, 2^13888481 is an apocalyptic number.

It is an amenable number.

13888481 is a deficient number, since it is larger than the sum of its proper divisors (603871).

13888481 is an equidigital number, since it uses as much as digits as its factorization.

13888481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603870.

The product of its digits is 49152, while the sum is 41.

The square root of 13888481 is about 3726.7252380609. The cubic root of 13888481 is about 240.3725752512.

The spelling of 13888481 in words is "thirteen million, eight hundred eighty-eight thousand, four hundred eighty-one".