12699890 has 32 divisors (see below), whose sum is σ = 26248320. Its totient is φ = 4333824.

The previous prime is 12699877. The next prime is 12699899. The reversal of 12699890 is 9899621.

It is a super-2 number, since 2×12699890² = 322574412024200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12699899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29114 + ... + 29546.

It is an arithmetic number, because the mean of its divisors is an integer number (820260).

Almost surely, 2^12699890 is an apocalyptic number.

12699890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12699890 is an abundant number, since it is smaller than the sum of its proper divisors (13548430).

12699890 is a wasteful number, since it uses less digits than its factorization.

12699890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 12699890 is about 3563.6905028355. The cubic root of 12699890 is about 233.3099817901.

The spelling of 12699890 in words is "twelve million, six hundred ninety-nine thousand, eight hundred ninety".