389309070 has 32 divisors (see below), whose sum is σ = 935470368. Its totient is φ = 103690368.

The previous prime is 389309047. The next prime is 389309071. The reversal of 389309070 is 70903983.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389309071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18912 + ... + 33708.

It is an arithmetic number, because the mean of its divisors is an integer number (29233449).

Almost surely, 2^389309070 is an apocalyptic number.

389309070 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

389309070 is an abundant number, since it is smaller than the sum of its proper divisors (546161298).

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

389309070 is a wasteful number, since it uses less digits than its factorization.

389309070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15684.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 389309070 is about 19730.9166031383. The cubic root of 389309070 is about 730.1826464853.

The spelling of 389309070 in words is "three hundred eighty-nine million, three hundred nine thousand, seventy".