11869840 has 40 divisors (see below), whose sum is σ = 28801728. Its totient is φ = 4540800.

The previous prime is 11869811. The next prime is 11869861. The reversal of 11869840 is 4896811.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 11869840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386 + ... + 5065.

Almost surely, 2^11869840 is an apocalyptic number.

11869840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11869840 is an abundant number, since it is smaller than the sum of its proper divisors (16931888).

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

11869840 is a wasteful number, since it uses less digits than its factorization.

11869840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6487 (or 6481 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 11869840 is about 3445.2634151832. The cubic root of 11869840 is about 228.1120819607.

It can be divided in two parts, 1186 and 9840, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 11869840 in words is "eleven million, eight hundred sixty-nine thousand, eight hundred forty".