11778426 has 64 divisors (see below), whose sum is σ = 29030400. Its totient is φ = 3510000.

The previous prime is 11778413. The next prime is 11778451. The reversal of 11778426 is 62487711.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46801 + ... + 47051.

It is an arithmetic number, because the mean of its divisors is an integer number (453600).

Almost surely, 2^11778426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11778426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14515200).

11778426 is an abundant number, since it is smaller than the sum of its proper divisors (17251974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11778426 is a wasteful number, since it uses less digits than its factorization.

11778426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 346 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 11778426 is about 3431.9711537249. The cubic root of 11778426 is about 227.5249805520.

The spelling of 11778426 in words is "eleven million, seven hundred seventy-eight thousand, four hundred twenty-six".