389558520 has 288 divisors, whose sum is σ = 1447383600. Its totient is φ = 90574848.

The previous prime is 389558489. The next prime is 389558531. The reversal of 389558520 is 25855983.

389558520 is a `hidden beast` number, since 38 + 95 + 5 + 8 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1155792 + ... + 1156128.

Almost surely, 2^389558520 is an apocalyptic number.

389558520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389558520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (723691800).

389558520 is an abundant number, since it is smaller than the sum of its proper divisors (1057825080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389558520 is a wasteful number, since it uses less digits than its factorization.

389558520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The square root of 389558520 is about 19737.2368886833. The cubic root of 389558520 is about 730.3385681648.

The spelling of 389558520 in words is "three hundred eighty-nine million, five hundred fifty-eight thousand, five hundred twenty".