12279690 has 48 divisors (see below), whose sum is σ = 32617728. Its totient is φ = 3203808.

The previous prime is 12279649. The next prime is 12279691. The reversal of 12279690 is 9697221.

It is a super-2 number, since 2×12279690² = 301581572992200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12279691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2779 + ... + 5681.

It is an arithmetic number, because the mean of its divisors is an integer number (679536).

Almost surely, 2^12279690 is an apocalyptic number.

12279690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12279690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16308864).

12279690 is an abundant number, since it is smaller than the sum of its proper divisors (20338038).

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

12279690 is a wasteful number, since it uses less digits than its factorization.

12279690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2963 (or 2960 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 12279690 is about 3504.2388617216. The cubic root of 12279690 is about 230.7079008817.

The spelling of 12279690 in words is "twelve million, two hundred seventy-nine thousand, six hundred ninety".