13887445 has 16 divisors (see below), whose sum is σ = 19579392. Its totient is φ = 9322560.

The previous prime is 13887427. The next prime is 13887449. The reversal of 13887445 is 54478831.

It is not a de Polignac number, because 13887445 - 2⁹ = 13886933 is a prime.

It is a super-2 number, since 2×13887445² = 385722257256050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13887398 and 13887407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887449) 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, 8997 + ... + 10426.

It is an arithmetic number, because the mean of its divisors is an integer number (1223712).

Almost surely, 2^13887445 is an apocalyptic number.

It is an amenable number.

13887445 is a deficient number, since it is larger than the sum of its proper divisors (5691947).

13887445 is a wasteful number, since it uses less digits than its factorization.

13887445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19452.

The product of its digits is 107520, while the sum is 40.

The square root of 13887445 is about 3726.5862394422. The cubic root of 13887445 is about 240.3665983034.

The spelling of 13887445 in words is "thirteen million, eight hundred eighty-seven thousand, four hundred forty-five".