12578340 has 24 divisors (see below), whose sum is σ = 35219520. Its totient is φ = 3354208.

The previous prime is 12578339. The next prime is 12578341. The reversal of 12578340 is 4387521.

It is an interprime number because it is at equal distance from previous prime (12578339) and next prime (12578341).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 12578298 and 12578307.

It is not an unprimeable number, because it can be changed into a prime (12578341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104760 + ... + 104879.

It is an arithmetic number, because the mean of its divisors is an integer number (1467480).

Almost surely, 2^12578340 is an apocalyptic number.

12578340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12578340 is an abundant number, since it is smaller than the sum of its proper divisors (22641180).

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

12578340 is a wasteful number, since it uses less digits than its factorization.

12578340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209651 (or 209649 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 12578340 is about 3546.5955506655. The cubic root of 12578340 is about 232.5632617771.

The spelling of 12578340 in words is "twelve million, five hundred seventy-eight thousand, three hundred forty".