13561400 has 24 divisors (see below), whose sum is σ = 31530720. Its totient is φ = 5424480.

The previous prime is 13561397. The next prime is 13561409. The reversal of 13561400 is 416531.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13561409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33704 + ... + 34103.

It is an arithmetic number, because the mean of its divisors is an integer number (1313780).

Almost surely, 2^13561400 is an apocalyptic number.

13561400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13561400 is an abundant number, since it is smaller than the sum of its proper divisors (17969320).

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

13561400 is a wasteful number, since it uses less digits than its factorization.

13561400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67823 (or 67814 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 13561400 is about 3682.5806169044. The cubic root of 13561400 is about 238.4705986579.

Adding to 13561400 its reverse (416531), we get a palindrome (13977931).

The spelling of 13561400 in words is "thirteen million, five hundred sixty-one thousand, four hundred".