13405838 has 4 divisors (see below), whose sum is σ = 20108760. Its totient is φ = 6702918.

The previous prime is 13405823. The next prime is 13405853. The reversal of 13405838 is 83850431.

It is a happy number.

13405838 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 is an interprime number because it is at equal distance from previous prime (13405823) and next prime (13405853).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3351458 + ... + 3351461.

It is an arithmetic number, because the mean of its divisors is an integer number (5027190).

Almost surely, 2^13405838 is an apocalyptic number.

13405838 is a deficient number, since it is larger than the sum of its proper divisors (6702922).

13405838 is an equidigital number, since it uses as much as digits as its factorization.

13405838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6702921.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 13405838 is about 3661.3983667446. The cubic root of 13405838 is about 237.5552624866. Note that the first 3 decimals are identical.

The spelling of 13405838 in words is "thirteen million, four hundred five thousand, eight hundred thirty-eight".