11878138 has 8 divisors (see below), whose sum is σ = 18865332. Its totient is φ = 5589696.

The previous prime is 11878133. The next prime is 11878171. The reversal of 11878138 is 83187811.

It can be written as a sum of positive squares in 2 ways, for example, as 10843849 + 1034289 = 3293^2 + 1017^2 .

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 = 11878097 and 11878106.

It is not an unprimeable number, because it can be changed into a prime (11878133) 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, 174645 + ... + 174712.

Almost surely, 2^11878138 is an apocalyptic number.

11878138 is a deficient number, since it is larger than the sum of its proper divisors (6987194).

11878138 is a wasteful number, since it uses less digits than its factorization.

11878138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349376.

The product of its digits is 10752, while the sum is 37.

The square root of 11878138 is about 3446.4674668420. The cubic root of 11878138 is about 228.1652259833.

The spelling of 11878138 in words is "eleven million, eight hundred seventy-eight thousand, one hundred thirty-eight".