13569920 has 128 divisors (see below), whose sum is σ = 40098240. Its totient is φ = 4276224.

The previous prime is 13569889. The next prime is 13569923. The reversal of 13569920 is 2996531.

13569920 = T₄₅₅ + T₄₅₆ + ... + T₅₅₉.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13569923) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 58124 + ... + 58356.

Almost surely, 2^13569920 is an apocalyptic number.

13569920 is a gapful number since it is divisible by the number (10) 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 13569920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20049120).

13569920 is an abundant number, since it is smaller than the sum of its proper divisors (26528320).

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

13569920 is a wasteful number, since it uses less digits than its factorization.

13569920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 13569920 is about 3683.7372327570. The cubic root of 13569920 is about 238.5205282168.

The spelling of 13569920 in words is "thirteen million, five hundred sixty-nine thousand, nine hundred twenty".