13887815472 has 120 divisors (see below), whose sum is σ = 42058808064. Its totient is φ = 4427970624.

The previous prime is 13887815471. The next prime is 13887815503. The reversal of 13887815472 is 27451878831.

13887815472 is a `hidden beast` number, since 13 + 8 + 8 + 7 + 81 + 547 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (13887815471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11773 + ... + 167075.

Almost surely, 2^13887815472 is an apocalyptic number.

13887815472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13887815472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21029404032).

13887815472 is an abundant number, since it is smaller than the sum of its proper divisors (28170992592).

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

13887815472 is a wasteful number, since it uses less digits than its factorization.

13887815472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155349 (or 155331 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 54.

The spelling of 13887815472 in words is "thirteen billion, eight hundred eighty-seven million, eight hundred fifteen thousand, four hundred seventy-two".