12939290 has 64 divisors (see below), whose sum is σ = 29272320. Its totient is φ = 4008960.

The previous prime is 12939287. The next prime is 12939343. The reversal of 12939290 is 9293921.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a zygodrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 12939290.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53570 + ... + 53810.

It is an arithmetic number, because the mean of its divisors is an integer number (457380).

Almost surely, 2^12939290 is an apocalyptic number.

12939290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12939290 is an abundant number, since it is smaller than the sum of its proper divisors (16333030).

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

12939290 is a wasteful number, since it uses less digits than its factorization.

12939290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 12939290 is about 3597.1224610791. The cubic root of 12939290 is about 234.7668730781.

The spelling of 12939290 in words is "twelve million, nine hundred thirty-nine thousand, two hundred ninety".