12938690 has 8 divisors (see below), whose sum is σ = 23289660. Its totient is φ = 5175472.

The previous prime is 12938689. The next prime is 12938711. The reversal of 12938690 is 9683921.

12938690 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 2 ways, for example, as 11812969 + 1125721 = 3437^2 + 1061^2 .

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

It is a super-2 number, since 2×12938690² = 334819397832200, which contains 22 as substring.

It is a Curzon number.

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, 646925 + ... + 646944.

Almost surely, 2^12938690 is an apocalyptic number.

12938690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12938690 is a deficient number, since it is larger than the sum of its proper divisors (10350970).

12938690 is a wasteful number, since it uses less digits than its factorization.

12938690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293876.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 12938690 is about 3597.0390601160. The cubic root of 12938690 is about 234.7632442777.

It can be divided in two parts, 1293 and 8690, that multiplied together give a triangular number (11236170 = T₄₇₄₀).

The spelling of 12938690 in words is "twelve million, nine hundred thirty-eight thousand, six hundred ninety".