13840581 has 8 divisors (see below), whose sum is σ = 18707200. Its totient is φ = 9100512.

The previous prime is 13840577. The next prime is 13840583. The reversal of 13840581 is 18504831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13840581 - 2² = 13840577 is a prime.

It is a super-2 number, since 2×13840581² = 383123364835122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13840583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31381 + ... + 31818.

It is an arithmetic number, because the mean of its divisors is an integer number (2338400).

Almost surely, 2^13840581 is an apocalyptic number.

It is an amenable number.

13840581 is a deficient number, since it is larger than the sum of its proper divisors (4866619).

13840581 is an equidigital number, since it uses as much as digits as its factorization.

13840581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63275.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 13840581 is about 3720.2931336119. The cubic root of 13840581 is about 240.0959165228.

The spelling of 13840581 in words is "thirteen million, eight hundred forty thousand, five hundred eighty-one".