12990578 has 8 divisors (see below), whose sum is σ = 19521372. Its totient is φ = 6483456.

The previous prime is 12990557. The next prime is 12990583. The reversal of 12990578 is 87509921.

It can be written as a sum of positive squares in 2 ways, for example, as 9504889 + 3485689 = 3083^2 + 1867^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4475 + ... + 6782.

Almost surely, 2^12990578 is an apocalyptic number.

12990578 is a deficient number, since it is larger than the sum of its proper divisors (6530794).

12990578 is a wasteful number, since it uses less digits than its factorization.

12990578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11836.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 12990578 is about 3604.2444423207. The cubic root of 12990578 is about 235.0766492084.

The spelling of 12990578 in words is "twelve million, nine hundred ninety thousand, five hundred seventy-eight".