13650138 has 12 divisors (see below), whose sum is σ = 29575338. Its totient is φ = 4550040.

The previous prime is 13650127. The next prime is 13650139. The reversal of 13650138 is 83105631.

13650138 is a `hidden beast` number, since 1 + 3 + 650 + 1 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13593969 + 56169 = 3687^2 + 237^2 .

It is not an unprimeable number, because it can be changed into a prime (13650139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 379153 + ... + 379188.

Almost surely, 2^13650138 is an apocalyptic number.

13650138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13650138 is an abundant number, since it is smaller than the sum of its proper divisors (15925200).

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

13650138 is a wasteful number, since it uses less digits than its factorization.

13650138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758349 (or 758346 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 13650138 is about 3694.6093162877. The cubic root of 13650138 is about 238.9896064060.

Adding to 13650138 its reverse (83105631), we get a palindrome (96755769).

The spelling of 13650138 in words is "thirteen million, six hundred fifty thousand, one hundred thirty-eight".