389552280 has 256 divisors, whose sum is σ = 1372049280. Its totient is φ = 87588864.

The previous prime is 389552249. The next prime is 389552281. The reversal of 389552280 is 82255983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389552281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 981042 + ... + 981438.

Almost surely, 2^389552280 is an apocalyptic number.

389552280 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 389552280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686024640).

389552280 is an abundant number, since it is smaller than the sum of its proper divisors (982497000).

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

389552280 is a wasteful number, since it uses less digits than its factorization.

389552280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 389552280 is about 19737.0788112122. The cubic root of 389552280 is about 730.3346685906.

The spelling of 389552280 in words is "three hundred eighty-nine million, five hundred fifty-two thousand, two hundred eighty".