389412660 has 192 divisors, whose sum is σ = 1361751552. Its totient is φ = 80953344.

The previous prime is 389412641. The next prime is 389412689. The reversal of 389412660 is 66214983.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 398092 + ... + 399068.

It is an arithmetic number, because the mean of its divisors is an integer number (7092456).

Almost surely, 2^389412660 is an apocalyptic number.

389412660 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 389412660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (680875776).

389412660 is an abundant number, since it is smaller than the sum of its proper divisors (972338892).

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

389412660 is a wasteful number, since it uses less digits than its factorization.

389412660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 389412660 is about 19733.5414966498. The cubic root of 389412660 is about 730.2474047269.

The spelling of 389412660 in words is "three hundred eighty-nine million, four hundred twelve thousand, six hundred sixty".