11778442 has 32 divisors (see below), whose sum is σ = 20301120. Its totient is φ = 5080320.

The previous prime is 11778413. The next prime is 11778451. The reversal of 11778442 is 24487711.

It is a junction number, because it is equal to n+sod(n) for n = 11778398 and 11778407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55717 + ... + 55927.

It is an arithmetic number, because the mean of its divisors is an integer number (634410).

Almost surely, 2^11778442 is an apocalyptic number.

11778442 is a deficient number, since it is larger than the sum of its proper divisors (8522678).

11778442 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 11778442 = (24141877)₉.

11778442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358.

The product of its digits is 12544, while the sum is 34.

The square root of 11778442 is about 3431.9734847461. The cubic root of 11778442 is about 227.5250835765.

The spelling of 11778442 in words is "eleven million, seven hundred seventy-eight thousand, four hundred forty-two".