12938890 has 16 divisors (see below), whose sum is σ = 23730408. Its totient is φ = 5077696.

The previous prime is 12938879. The next prime is 12938897. The reversal of 12938890 is 9883921.

12938890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9865881 + 3073009 = 3141^2 + 1753^2 .

It is not an unprimeable number, because it can be changed into a prime (12938897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11677 + ... + 12736.

Almost surely, 2^12938890 is an apocalyptic number.

12938890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12938890 is a deficient number, since it is larger than the sum of its proper divisors (10791518).

12938890 is a wasteful number, since it uses less digits than its factorization.

12938890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24473.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 12938890 is about 3597.0668606519. The cubic root of 12938890 is about 234.7644538903.

The spelling of 12938890 in words is "twelve million, nine hundred thirty-eight thousand, eight hundred ninety".