13120638 has 8 divisors (see below), whose sum is σ = 26241288. Its totient is φ = 4373544.

The previous prime is 13120631. The next prime is 13120643. The reversal of 13120638 is 83602131.

13120638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

13120638 is an admirable number.

It is a super-2 number, since 2×13120638² = 344302283054088, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120631) 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, 1093381 + ... + 1093392.

It is an arithmetic number, because the mean of its divisors is an integer number (3280161).

Almost surely, 2^13120638 is an apocalyptic number.

13120638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13120638 is a wasteful number, since it uses less digits than its factorization.

13120638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186778.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 13120638 is about 3622.2421233264. The cubic root of 13120638 is about 235.8585645888.

Adding to 13120638 its reverse (83602131), we get a palindrome (96722769).

The spelling of 13120638 in words is "thirteen million, one hundred twenty thousand, six hundred thirty-eight".