11978026 has 4 divisors (see below), whose sum is σ = 17967042. Its totient is φ = 5989012.

The previous prime is 11978023. The next prime is 11978033. The reversal of 11978026 is 62087911.

It is a happy number.

11978026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8116801 + 3861225 = 2849^2 + 1965^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11977982 and 11978000.

It is not an unprimeable number, because it can be changed into a prime (11978023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2994505 + ... + 2994508.

Almost surely, 2^11978026 is an apocalyptic number.

11978026 is a deficient number, since it is larger than the sum of its proper divisors (5989016).

11978026 is an equidigital number, since it uses as much as digits as its factorization.

11978026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5989015.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 11978026 is about 3460.9284881373. The cubic root of 11978026 is about 228.8030189546.

The spelling of 11978026 in words is "eleven million, nine hundred seventy-eight thousand, twenty-six".