11865408 has 56 divisors (see below), whose sum is σ = 32491680. Its totient is φ = 3816960.

The previous prime is 11865407. The next prime is 11865409. The reversal of 11865408 is 80456811.

It is an interprime number because it is at equal distance from previous prime (11865407) and next prime (11865409).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11865407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4503 + ... + 6633.

Almost surely, 2^11865408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11865408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16245840).

11865408 is an abundant number, since it is smaller than the sum of its proper divisors (20626272).

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

11865408 is a wasteful number, since it uses less digits than its factorization.

11865408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175 (or 2165 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 11865408 is about 3444.6201532244. The cubic root of 11865408 is about 228.0836873459.

The spelling of 11865408 in words is "eleven million, eight hundred sixty-five thousand, four hundred eight".