13890138 has 8 divisors (see below), whose sum is σ = 27780288. Its totient is φ = 4630044.

The previous prime is 13890119. The next prime is 13890143. The reversal of 13890138 is 83109831.

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

13890138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 13890099 and 13890108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157506 + ... + 1157517.

It is an arithmetic number, because the mean of its divisors is an integer number (3472536).

Almost surely, 2^13890138 is an apocalyptic number.

13890138 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.

13890138 is a wasteful number, since it uses less digits than its factorization.

13890138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315028.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 13890138 is about 3726.9475445732. The cubic root of 13890138 is about 240.3821342884.

Adding to 13890138 its reverse (83109831), we get a palindrome (96999969).

It can be divided in two parts, 13890 and 138, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13890138 in words is "thirteen million, eight hundred ninety thousand, one hundred thirty-eight".