11972578 has 8 divisors (see below), whose sum is σ = 18037980. Its totient is φ = 5959920.

The previous prime is 11972557. The next prime is 11972579. The reversal of 11972578 is 87527911.

It can be written as a sum of positive squares in 2 ways, for example, as 10452289 + 1520289 = 3233^2 + 1233^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 11972578.

It is not an unprimeable number, because it can be changed into a prime (11972579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12613 + ... + 13528.

Almost surely, 2^11972578 is an apocalyptic number.

11972578 is a deficient number, since it is larger than the sum of its proper divisors (6065402).

11972578 is a wasteful number, since it uses less digits than its factorization.

11972578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26372.

The product of its digits is 35280, while the sum is 40.

The square root of 11972578 is about 3460.1413265935. The cubic root of 11972578 is about 228.7683246490.

The spelling of 11972578 in words is "eleven million, nine hundred seventy-two thousand, five hundred seventy-eight".