11778140 has 72 divisors (see below), whose sum is σ = 28242816. Its totient is φ = 4118400.

The previous prime is 11778121. The next prime is 11778149. The reversal of 11778140 is 4187711.

11778140 = T₂₁₁ + T₂₁₂ + ... + T₄₃₀.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778149) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 74942 + ... + 75098.

Almost surely, 2^11778140 is an apocalyptic number.

11778140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11778140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14121408).

11778140 is an abundant number, since it is smaller than the sum of its proper divisors (16464676).

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

11778140 is a wasteful number, since it uses less digits than its factorization.

11778140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 11778140 is about 3431.9294864551. The cubic root of 11778140 is about 227.5231389740.

The spelling of 11778140 in words is "eleven million, seven hundred seventy-eight thousand, one hundred forty".