13920138 has 12 divisors (see below), whose sum is σ = 30160338. Its totient is φ = 4640040.

The previous prime is 13920133. The next prime is 13920143. The reversal of 13920138 is 83102931.

13920138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13920133) and next prime (13920143).

It can be written as a sum of positive squares in only one way, i.e., 12089529 + 1830609 = 3477^2 + 1353^2 .

It is not an unprimeable number, because it can be changed into a prime (13920133) 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, 386653 + ... + 386688.

Almost surely, 2^13920138 is an apocalyptic number.

13920138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13920138 is an abundant number, since it is smaller than the sum of its proper divisors (16240200).

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

13920138 is a wasteful number, since it uses less digits than its factorization.

13920138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773349 (or 773346 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 13920138 is about 3730.9701151309. The cubic root of 13920138 is about 240.5550694184. Note that the first 3 decimals are identical.

The spelling of 13920138 in words is "thirteen million, nine hundred twenty thousand, one hundred thirty-eight".