13643456 has 28 divisors (see below), whose sum is σ = 28011120. Its totient is φ = 6585600.

The previous prime is 13643437. The next prime is 13643459. The reversal of 13643456 is 65434631.

It is a super-2 number, since 2×13643456² = 372287783247872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (13643459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1820 + ... + 5531.

Almost surely, 2^13643456 is an apocalyptic number.

13643456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13643456 is an abundant number, since it is smaller than the sum of its proper divisors (14367664).

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

13643456 is an equidigital number, since it uses as much as digits as its factorization.

13643456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7392 (or 7382 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 13643456 is about 3693.7049151225. The cubic root of 13643456 is about 238.9506034011.

The spelling of 13643456 in words is "thirteen million, six hundred forty-three thousand, four hundred fifty-six".