12920328 has 48 divisors (see below), whose sum is σ = 35271600. Its totient is φ = 4272480.

The previous prime is 12920317. The next prime is 12920377. The reversal of 12920328 is 82302921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9363 + ... + 10653.

It is an arithmetic number, because the mean of its divisors is an integer number (734825).

Almost surely, 2^12920328 is an apocalyptic number.

12920328 is a gapful number since it is divisible by the number (18) 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 12920328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17635800).

12920328 is an abundant number, since it is smaller than the sum of its proper divisors (22351272).

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

12920328 is a wasteful number, since it uses less digits than its factorization.

12920328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12920328 is about 3594.4857768532. The cubic root of 12920328 is about 234.6521365975.

The spelling of 12920328 in words is "twelve million, nine hundred twenty thousand, three hundred twenty-eight".