389146815 has 32 divisors (see below), whose sum is σ = 693047040. Its totient is φ = 207175968.

The previous prime is 389146789. The next prime is 389146817. The reversal of 389146815 is 518641983.

It is not a de Polignac number, because 389146815 - 2⁵ = 389146783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389146817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84564 + ... + 89046.

It is an arithmetic number, because the mean of its divisors is an integer number (21657720).

Almost surely, 2^389146815 is an apocalyptic number.

389146815 is a deficient number, since it is larger than the sum of its proper divisors (303900225).

389146815 is a wasteful number, since it uses less digits than its factorization.

389146815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5140 (or 5134 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 389146815 is about 19726.8044801990. The cubic root of 389146815 is about 730.0811913198.

The spelling of 389146815 in words is "three hundred eighty-nine million, one hundred forty-six thousand, eight hundred fifteen".