13388550 has 96 divisors (see below), whose sum is σ = 38997504. Its totient is φ = 2976000.

The previous prime is 13388549. The next prime is 13388563. The reversal of 13388550 is 5588331.

It is a super-2 number, since 2×13388550² = 358506542205000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42895 + ... + 43205.

It is an arithmetic number, because the mean of its divisors is an integer number (406224).

Almost surely, 2^13388550 is an apocalyptic number.

13388550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13388550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19498752).

13388550 is an abundant number, since it is smaller than the sum of its proper divisors (25608954).

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

13388550 is a wasteful number, since it uses less digits than its factorization.

13388550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 13388550 is about 3659.0367584926. The cubic root of 13388550 is about 237.4531024668.

The spelling of 13388550 in words is "thirteen million, three hundred eighty-eight thousand, five hundred fifty".