13391406 has 80 divisors (see below), whose sum is σ = 35138400. Its totient is φ = 3810240.

The previous prime is 13391401. The next prime is 13391423. The reversal of 13391406 is 60419331.

13391406 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13391406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13391401) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 55446 + ... + 55686.

It is an arithmetic number, because the mean of its divisors is an integer number (439230).

Almost surely, 2^13391406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13391406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17569200).

13391406 is an abundant number, since it is smaller than the sum of its proper divisors (21746994).

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

13391406 is an equidigital number, since it uses as much as digits as its factorization.

13391406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 13391406 is about 3659.4270043273. The cubic root of 13391406 is about 237.4699854960.

The spelling of 13391406 in words is "thirteen million, three hundred ninety-one thousand, four hundred six".