12958778 has 16 divisors (see below), whose sum is σ = 22529664. Its totient is φ = 5475120.

The previous prime is 12958733. The next prime is 12958787. The reversal of 12958778 is 87785921.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5525 + ... + 7512.

It is an arithmetic number, because the mean of its divisors is an integer number (1408104).

Almost surely, 2^12958778 is an apocalyptic number.

12958778 is a deficient number, since it is larger than the sum of its proper divisors (9570886).

12958778 is a wasteful number, since it uses less digits than its factorization.

12958778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13117.

The product of its digits is 282240, while the sum is 47.

The square root of 12958778 is about 3599.8302737768. The cubic root of 12958778 is about 234.8846755710.

The spelling of 12958778 in words is "twelve million, nine hundred fifty-eight thousand, seven hundred seventy-eight".