3685886021 has 8 divisors (see below), whose sum is σ = 3783408888. Its totient is φ = 3589560000.

The previous prime is 3685886011. The next prime is 3685886023. The reversal of 3685886021 is 1206885863.

3685886021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14737921 + 3671148100 = 3839^2 + 60590^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3685886021 - 2¹⁰ = 3685884997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685886023) 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, 292970 + ... + 305291.

It is an arithmetic number, because the mean of its divisors is an integer number (472926111).

Almost surely, 2^3685886021 is an apocalyptic number.

It is an amenable number.

3685886021 is a deficient number, since it is larger than the sum of its proper divisors (97522867).

3685886021 is a wasteful number, since it uses less digits than its factorization.

3685886021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598423.

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 3685886021 is about 60711.4982602143. The cubic root of 3685886021 is about 1544.7112178671.

The spelling of 3685886021 in words is "three billion, six hundred eighty-five million, eight hundred eighty-six thousand, twenty-one".