389778200 has 48 divisors (see below), whose sum is σ = 1035700080. Its totient is φ = 133637760.

The previous prime is 389778161. The next prime is 389778203. The reversal of 389778200 is 2877983.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389778203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137807 + ... + 140606.

It is an arithmetic number, because the mean of its divisors is an integer number (21577085).

Almost surely, 2^389778200 is an apocalyptic number.

It is an amenable number.

389778200 is an abundant number, since it is smaller than the sum of its proper divisors (645921880).

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

389778200 is a wasteful number, since it uses less digits than its factorization.

389778200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278436 (or 278427 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 389778200 is about 19742.8012196851. The cubic root of 389778200 is about 730.4758266418.

The spelling of 389778200 in words is "three hundred eighty-nine million, seven hundred seventy-eight thousand, two hundred".