11981626 has 8 divisors (see below), whose sum is σ = 18013140. Its totient is φ = 5977248.

The previous prime is 11981623. The next prime is 11981639. The reversal of 11981626 is 62618911.

It can be written as a sum of positive squares in 2 ways, for example, as 11730625 + 251001 = 3425^2 + 501^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 11981591 and 11981600.

It is not an unprimeable number, because it can be changed into a prime (11981623) 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, 5641 + ... + 7468.

Almost surely, 2^11981626 is an apocalyptic number.

11981626 is a deficient number, since it is larger than the sum of its proper divisors (6031514).

11981626 is a wasteful number, since it uses less digits than its factorization.

11981626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13568.

The product of its digits is 5184, while the sum is 34.

The square root of 11981626 is about 3461.4485407124. The cubic root of 11981626 is about 228.8259389349.

The spelling of 11981626 in words is "eleven million, nine hundred eighty-one thousand, six hundred twenty-six".