389766720 has 224 divisors, whose sum is σ = 1460699136. Its totient is φ = 86169600.

The previous prime is 389766647. The next prime is 389766731. The reversal of 389766720 is 27667983.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 389766720.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207385 + ... + 209255.

Almost surely, 2^389766720 is an apocalyptic number.

389766720 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 389766720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730349568).

389766720 is an abundant number, since it is smaller than the sum of its proper divisors (1070932416).

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

389766720 is a wasteful number, since it uses less digits than its factorization.

389766720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 48.

The square root of 389766720 is about 19742.5104786600. The cubic root of 389766720 is about 730.4686550890.

The spelling of 389766720 in words is "three hundred eighty-nine million, seven hundred sixty-six thousand, seven hundred twenty".