12940398 has 60 divisors (see below), whose sum is σ = 30512328. Its totient is φ = 4098600.

The previous prime is 12940393. The next prime is 12940429. The reversal of 12940398 is 89304921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12940393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 85623 + ... + 85773.

Almost surely, 2^12940398 is an apocalyptic number.

12940398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12940398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15256164).

12940398 is an abundant number, since it is smaller than the sum of its proper divisors (17571930).

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

12940398 is a wasteful number, since it uses less digits than its factorization.

12940398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 12940398 is about 3597.2764697754. The cubic root of 12940398 is about 234.7735739680.

The spelling of 12940398 in words is "twelve million, nine hundred forty thousand, three hundred ninety-eight".