11978426 has 8 divisors (see below), whose sum is σ = 18029844. Its totient is φ = 5968480.

The previous prime is 11978419. The next prime is 11978429. The reversal of 11978426 is 62487911.

It can be written as a sum of positive squares in 2 ways, for example, as 9579025 + 2399401 = 3095^2 + 1549^2 .

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

It is a super-3 number, since 3×11978426³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11978426.

It is not an unprimeable number, because it can be changed into a prime (11978429) 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, 9635 + ... + 10806.

Almost surely, 2^11978426 is an apocalyptic number.

11978426 is a deficient number, since it is larger than the sum of its proper divisors (6051418).

11978426 is a wasteful number, since it uses less digits than its factorization.

11978426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20736.

The product of its digits is 24192, while the sum is 38.

The square root of 11978426 is about 3460.9862756157. The cubic root of 11978426 is about 228.8055658458.

The spelling of 11978426 in words is "eleven million, nine hundred seventy-eight thousand, four hundred twenty-six".