12940890 has 16 divisors (see below), whose sum is σ = 31058208. Its totient is φ = 3450896.

The previous prime is 12940877. The next prime is 12940897. The reversal of 12940890 is 9804921.

It is not an unprimeable number, because it can be changed into a prime (12940897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215652 + ... + 215711.

It is an arithmetic number, because the mean of its divisors is an integer number (1941138).

Almost surely, 2^12940890 is an apocalyptic number.

12940890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12940890 is an abundant number, since it is smaller than the sum of its proper divisors (18117318).

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

12940890 is a wasteful number, since it uses less digits than its factorization.

12940890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431373.

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

The square root of 12940890 is about 3597.3448541945. The cubic root of 12940890 is about 234.7765493307.

The spelling of 12940890 in words is "twelve million, nine hundred forty thousand, eight hundred ninety".