12578378 has 16 divisors (see below), whose sum is σ = 19897920. Its totient is φ = 5951616.

The previous prime is 12578359. The next prime is 12578393. The reversal of 12578378 is 87387521.

It is a super-2 number, since 2×12578378² = 316431186221768, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3053 + ... + 5871.

It is an arithmetic number, because the mean of its divisors is an integer number (1243620).

Almost surely, 2^12578378 is an apocalyptic number.

12578378 is a deficient number, since it is larger than the sum of its proper divisors (7319542).

12578378 is a wasteful number, since it uses less digits than its factorization.

12578378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941.

The product of its digits is 94080, while the sum is 41.

The square root of 12578378 is about 3546.6009079117. The cubic root of 12578378 is about 232.5634959732.

The spelling of 12578378 in words is "twelve million, five hundred seventy-eight thousand, three hundred seventy-eight".