382866021 has 10 divisors (see below), whose sum is σ = 571935782. Its totient is φ = 255243960.

The previous prime is 382866019. The next prime is 382866031. The reversal of 382866021 is 120668283.

It can be written as a sum of positive squares in only one way, i.e., 375816996 + 7049025 = 19386^2 + 2655^2 .

It is not a de Polignac number, because 382866021 - 2¹ = 382866019 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 (382866031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2363290 + ... + 2363451.

Almost surely, 2^382866021 is an apocalyptic number.

It is an amenable number.

382866021 is a deficient number, since it is larger than the sum of its proper divisors (189069761).

382866021 is an equidigital number, since it uses as much as digits as its factorization.

382866021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4726753 (or 4726744 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 382866021 is about 19566.9624878263. The cubic root of 382866021 is about 726.1320537059.

The spelling of 382866021 in words is "three hundred eighty-two million, eight hundred sixty-six thousand, twenty-one".