3866535440 has 40 divisors (see below), whose sum is σ = 8996209920. Its totient is φ = 1545493376.

The previous prime is 3866535427. The next prime is 3866535467. The reversal of 3866535440 is 445356683.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 3866535391 and 3866535400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98327 + ... + 131913.

It is an arithmetic number, because the mean of its divisors is an integer number (224905248).

Almost surely, 2^3866535440 is an apocalyptic number.

It is an amenable number.

3866535440 is an abundant number, since it is smaller than the sum of its proper divisors (5129674480).

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

3866535440 is a wasteful number, since it uses less digits than its factorization.

3866535440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35039 (or 35033 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The square root of 3866535440 is about 62181.4718384826. The cubic root of 3866535440 is about 1569.5458191020.

The spelling of 3866535440 in words is "three billion, eight hundred sixty-six million, five hundred thirty-five thousand, four hundred forty".