389992680 has 288 divisors, whose sum is σ = 1593446400. Its totient is φ = 80974080.

The previous prime is 389992663. The next prime is 389992693. The reversal of 389992680 is 86299983.

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, 304281 + ... + 305559.

It is an arithmetic number, because the mean of its divisors is an integer number (5532800).

Almost surely, 2^389992680 is an apocalyptic number.

389992680 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 389992680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796723200).

389992680 is an abundant number, since it is smaller than the sum of its proper divisors (1203453720).

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

389992680 is a wasteful number, since it uses less digits than its factorization.

389992680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325 (or 1307 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 389992680 is about 19748.2323259577. The cubic root of 389992680 is about 730.6097863545.

The spelling of 389992680 in words is "three hundred eighty-nine million, nine hundred ninety-two thousand, six hundred eighty".