389209212 has 72 divisors (see below), whose sum is σ = 1166046336. Its totient is φ = 111200688.

The previous prime is 389209207. The next prime is 389209213. The reversal of 389209212 is 212902983.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389209213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21798 + ... + 35405.

It is an arithmetic number, because the mean of its divisors is an integer number (16195088).

Almost surely, 2^389209212 is an apocalyptic number.

It is an amenable number.

389209212 is an abundant number, since it is smaller than the sum of its proper divisors (776837124).

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

389209212 is a wasteful number, since it uses less digits than its factorization.

389209212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57229 (or 57215 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 389209212 is about 19728.3859451299. The cubic root of 389209212 is about 730.1202103907.

The spelling of 389209212 in words is "three hundred eighty-nine million, two hundred nine thousand, two hundred twelve".