4086865440 has 288 divisors, whose sum is σ = 16001556480. Its totient is φ = 930465792.

The previous prime is 4086865429. The next prime is 4086865459. The reversal of 4086865440 is 445686804.

4086865440 is a `hidden beast` number, since 40 + 8 + 68 + 6 + 544 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3194721 + ... + 3195999.

It is an arithmetic number, because the mean of its divisors is an integer number (55560960).

Almost surely, 2^4086865440 is an apocalyptic number.

4086865440 is a gapful number since it is divisible by the number (40) 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 4086865440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8000778240).

4086865440 is an abundant number, since it is smaller than the sum of its proper divisors (11914691040).

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

4086865440 is a wasteful number, since it uses less digits than its factorization.

4086865440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The square root of 4086865440 is about 63928.5964181914. The cubic root of 4086865440 is about 1598.8097189056.

The spelling of 4086865440 in words is "four billion, eighty-six million, eight hundred sixty-five thousand, four hundred forty".