12889990 has 32 divisors (see below), whose sum is σ = 24040800. Its totient is φ = 4972800.

The previous prime is 12889973. The next prime is 12889991. The reversal of 12889990 is 9998821.

It is a happy number.

12889990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12889990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12889991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60985 + ... + 61195.

It is an arithmetic number, because the mean of its divisors is an integer number (751275).

Almost surely, 2^12889990 is an apocalyptic number.

12889990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12889990 is a deficient number, since it is larger than the sum of its proper divisors (11150810).

12889990 is a wasteful number, since it uses less digits than its factorization.

12889990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 12889990 is about 3590.2632215480. The cubic root of 12889990 is about 234.4683317770.

The spelling of 12889990 in words is "twelve million, eight hundred eighty-nine thousand, nine hundred ninety".