380638521 has 20 divisors (see below), whose sum is σ = 569184000. Its totient is φ = 253502136.

The previous prime is 380638519. The next prime is 380638549. The reversal of 380638521 is 125836083.

It is not a de Polignac number, because 380638521 - 2¹ = 380638519 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (380638501) 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 19 ways as a sum of consecutive naturals, for example, 111640 + ... + 114998.

It is an arithmetic number, because the mean of its divisors is an integer number (28459200).

Almost surely, 2^380638521 is an apocalyptic number.

It is an amenable number.

380638521 is a deficient number, since it is larger than the sum of its proper divisors (188545479).

380638521 is a wasteful number, since it uses less digits than its factorization.

380638521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4770 (or 4761 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 380638521 is about 19509.9595335306. The cubic root of 380638521 is about 724.7211109645.

The spelling of 380638521 in words is "three hundred eighty million, six hundred thirty-eight thousand, five hundred twenty-one".