13888520 has 32 divisors (see below), whose sum is σ = 31561920. Its totient is φ = 5499840.

The previous prime is 13888519. The next prime is 13888531. The reversal of 13888520 is 2588831.

13888520 = 315² + 316² + ... + 417².

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2435 + ... + 5805.

It is an arithmetic number, because the mean of its divisors is an integer number (986310).

Almost surely, 2^13888520 is an apocalyptic number.

13888520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13888520 is an abundant number, since it is smaller than the sum of its proper divisors (17673400).

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

13888520 is a wasteful number, since it uses less digits than its factorization.

13888520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3485 (or 3481 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 13888520 is about 3726.7304705331. The cubic root of 13888520 is about 240.3728002464.

The spelling of 13888520 in words is "thirteen million, eight hundred eighty-eight thousand, five hundred twenty".