12909732 has 72 divisors (see below), whose sum is σ = 35124768. Its totient is φ = 3674880.

The previous prime is 12909709. The next prime is 12909751. The reversal of 12909732 is 23790921.

12909732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12909732² = 333322360623648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 12909693 and 12909702.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24423 + ... + 24945.

It is an arithmetic number, because the mean of its divisors is an integer number (487844).

Almost surely, 2^12909732 is an apocalyptic number.

12909732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12909732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17562384).

12909732 is an abundant number, since it is smaller than the sum of its proper divisors (22215036).

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

12909732 is a wasteful number, since it uses less digits than its factorization.

12909732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 12909732 is about 3593.0115502180. The cubic root of 12909732 is about 234.5879727454.

The spelling of 12909732 in words is "twelve million, nine hundred nine thousand, seven hundred thirty-two".