13880866 has 4 divisors (see below), whose sum is σ = 20821302. Its totient is φ = 6940432.

The previous prime is 13880861. The next prime is 13880899. The reversal of 13880866 is 66808831.

13880866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7403841 + 6477025 = 2721^2 + 2545^2 .

It is not an unprimeable number, because it can be changed into a prime (13880861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3470215 + ... + 3470218.

Almost surely, 2^13880866 is an apocalyptic number.

13880866 is a deficient number, since it is larger than the sum of its proper divisors (6940436).

13880866 is an equidigital number, since it uses as much as digits as its factorization.

13880866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6940435.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 13880866 is about 3725.7034235162. The cubic root of 13880866 is about 240.3286354375.

The spelling of 13880866 in words is "thirteen million, eight hundred eighty thousand, eight hundred sixty-six".