389422521 has 48 divisors (see below), whose sum is σ = 594696960. Its totient is φ = 245306880.

The previous prime is 389422511. The next prime is 389422543. The reversal of 389422521 is 125224983.

It is a happy number.

It is not a de Polignac number, because 389422521 - 2⁵ = 389422489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (389422511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2972626 + ... + 2972756.

It is an arithmetic number, because the mean of its divisors is an integer number (12389520).

Almost surely, 2^389422521 is an apocalyptic number.

It is an amenable number.

389422521 is a deficient number, since it is larger than the sum of its proper divisors (205274439).

389422521 is a wasteful number, since it uses less digits than its factorization.

389422521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 363 counting only the distinct ones).

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

The square root of 389422521 is about 19733.7913488513. The cubic root of 389422521 is about 730.2535686327.

The spelling of 389422521 in words is "three hundred eighty-nine million, four hundred twenty-two thousand, five hundred twenty-one".