13705280 has 28 divisors (see below), whose sum is σ = 32636460. Its totient is φ = 5481984.

The previous prime is 13705273. The next prime is 13705301. The reversal of 13705280 is 8250731.

It can be written as a sum of positive squares in 2 ways, for example, as 8248384 + 5456896 = 2872^2 + 2336^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21095 + ... + 21734.

Almost surely, 2^13705280 is an apocalyptic number.

13705280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13705280 is an abundant number, since it is smaller than the sum of its proper divisors (18931180).

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

13705280 is an equidigital number, since it uses as much as digits as its factorization.

13705280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42846 (or 42836 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 13705280 is about 3702.0642890150. The cubic root of 13705280 is about 239.3109867758.

The spelling of 13705280 in words is "thirteen million, seven hundred five thousand, two hundred eighty".