446381021 has 8 divisors (see below), whose sum is σ = 463498200. Its totient is φ = 429378880.

The previous prime is 446381011. The next prime is 446381029. The reversal of 446381021 is 120183644.

It can be written as a sum of positive squares in 4 ways, for example, as 99900025 + 346480996 = 9995^2 + 18614^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-446381021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (446381029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20810 + ... + 36411.

It is an arithmetic number, because the mean of its divisors is an integer number (57937275).

Almost surely, 2^446381021 is an apocalyptic number.

It is an amenable number.

446381021 is a deficient number, since it is larger than the sum of its proper divisors (17117179).

446381021 is a wasteful number, since it uses less digits than its factorization.

446381021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57519.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 446381021 is about 21127.7310897313. The cubic root of 446381021 is about 764.2496357417.

The spelling of 446381021 in words is "four hundred forty-six million, three hundred eighty-one thousand, twenty-one".