389915645 has 8 divisors (see below), whose sum is σ = 534741504. Its totient is φ = 267370704.

The previous prime is 389915633. The next prime is 389915671. The reversal of 389915645 is 546519983.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 389915645 - 2⁴ = 389915629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 389915593 and 389915602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5570189 + ... + 5570258.

It is an arithmetic number, because the mean of its divisors is an integer number (66842688).

Almost surely, 2^389915645 is an apocalyptic number.

389915645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

389915645 is a deficient number, since it is larger than the sum of its proper divisors (144825859).

389915645 is a wasteful number, since it uses less digits than its factorization.

389915645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11140459.

The product of its digits is 1166400, while the sum is 50.

The square root of 389915645 is about 19746.2818018988. The cubic root of 389915645 is about 730.5616775617.

The spelling of 389915645 in words is "three hundred eighty-nine million, nine hundred fifteen thousand, six hundred forty-five".