12398040 has 48 divisors (see below), whose sum is σ = 40294800. Its totient is φ = 3306048.

The previous prime is 12398039. The next prime is 12398041. The reversal of 12398040 is 4089321.

It is an interprime number because it is at equal distance from previous prime (12398039) and next prime (12398041).

It is a super-2 number, since 2×12398040² = 307422791683200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12397995 and 12398013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12398041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16860 + ... + 17579.

It is an arithmetic number, because the mean of its divisors is an integer number (839475).

Almost surely, 2^12398040 is an apocalyptic number.

12398040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12398040 is an abundant number, since it is smaller than the sum of its proper divisors (27896760).

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

12398040 is a wasteful number, since it uses less digits than its factorization.

12398040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34456 (or 34449 counting only the distinct ones).

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

The square root of 12398040 is about 3521.0850600348. The cubic root of 12398040 is about 231.4467096634.

The spelling of 12398040 in words is "twelve million, three hundred ninety-eight thousand, forty".