12780578 has 16 divisors (see below), whose sum is σ = 20412000. Its totient is φ = 5984352.

The previous prime is 12780557. The next prime is 12780601. The reversal of 12780578 is 87508721.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1493 + ... + 5271.

It is an arithmetic number, because the mean of its divisors is an integer number (1275750).

Almost surely, 2^12780578 is an apocalyptic number.

12780578 is a deficient number, since it is larger than the sum of its proper divisors (7631422).

12780578 is a wasteful number, since it uses less digits than its factorization.

12780578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 12780578 is about 3574.9934265674. The cubic root of 12780578 is about 233.8030460983.

The spelling of 12780578 in words is "twelve million, seven hundred eighty thousand, five hundred seventy-eight".