13840481 has 4 divisors (see below), whose sum is σ = 13885872. Its totient is φ = 13795092.

The previous prime is 13840451. The next prime is 13840483. The reversal of 13840481 is 18404831.

13840481 is digitally balanced in base 3, 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18404831 = 2969 ⋅6199.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13840481 is a prime.

It is a super-2 number, since 2×13840481² = 383117828622722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13840483) 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, 22235 + ... + 22848.

It is an arithmetic number, because the mean of its divisors is an integer number (3471468).

Almost surely, 2^13840481 is an apocalyptic number.

It is an amenable number.

13840481 is a deficient number, since it is larger than the sum of its proper divisors (45391).

13840481 is an equidigital number, since it uses as much as digits as its factorization.

13840481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45390.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 13840481 is about 3720.2796937865. The cubic root of 13840481 is about 240.0953382799.

The spelling of 13840481 in words is "thirteen million, eight hundred forty thousand, four hundred eighty-one".