389499999 has 16 divisors (see below), whose sum is σ = 609566208. Its totient is φ = 216555552.

The previous prime is 389499991. The next prime is 389500003. The reversal of 389499999 is 999994983.

It is not a de Polignac number, because 389499999 - 2³ = 389499991 is a prime.

389499999 is a modest number, since divided by 99999 gives 3894 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389499991) 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, 249867 + ... + 251420.

It is an arithmetic number, because the mean of its divisors is an integer number (38097888).

Almost surely, 2^389499999 is an apocalyptic number.

389499999 is a deficient number, since it is larger than the sum of its proper divisors (220066209).

389499999 is a wasteful number, since it uses less digits than its factorization.

389499999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501334.

The product of its digits is 51018336, while the sum is 69.

The square root of 389499999 is about 19735.7543306558. The cubic root of 389499999 is about 730.3019948974.

The spelling of 389499999 in words is "three hundred eighty-nine million, four hundred ninety-nine thousand, nine hundred ninety-nine".