13953906 has 48 divisors (see below), whose sum is σ = 33067008. Its totient is φ = 4233600.

The previous prime is 13953869. The next prime is 13953931. The reversal of 13953906 is 60935931.

It is a super-2 number, since 2×13953906² = 389422985313672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8751 + ... + 10221.

It is an arithmetic number, because the mean of its divisors is an integer number (688896).

Almost surely, 2^13953906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13953906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16533504).

13953906 is an abundant number, since it is smaller than the sum of its proper divisors (19113102).

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

13953906 is a wasteful number, since it uses less digits than its factorization.

13953906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527 (or 1524 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The square root of 13953906 is about 3735.4927385822. The cubic root of 13953906 is about 240.7494282198.

It can be divided in two parts, 139 and 53906, that added together give a palindrome (54045).

The spelling of 13953906 in words is "thirteen million, nine hundred fifty-three thousand, nine hundred six".