12928398 has 64 divisors (see below), whose sum is σ = 32970240. Its totient is φ = 3290112.

The previous prime is 12928397. The next prime is 12928427. The reversal of 12928398 is 89382921.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12928393) 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 31 ways as a sum of consecutive naturals, for example, 13090 + ... + 14042.

It is an arithmetic number, because the mean of its divisors is an integer number (515160).

Almost surely, 2^12928398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12928398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16485120).

12928398 is an abundant number, since it is smaller than the sum of its proper divisors (20041842).

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

12928398 is a wasteful number, since it uses less digits than its factorization.

12928398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001.

The product of its digits is 62208, while the sum is 42.

The square root of 12928398 is about 3595.6081544017. The cubic root of 12928398 is about 234.7009807812.

The spelling of 12928398 in words is "twelve million, nine hundred twenty-eight thousand, three hundred ninety-eight".