389944453 has 4 divisors (see below), whose sum is σ = 412882380. Its totient is φ = 367006528.

The previous prime is 389944441. The next prime is 389944463. The reversal of 389944453 is 354449983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 296976289 + 92968164 = 17233^2 + 9642^2 .

It is a cyclic number.

It is not a de Polignac number, because 389944453 - 2⁵ = 389944421 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 389944397 and 389944406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389944433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11468938 + ... + 11468971.

It is an arithmetic number, because the mean of its divisors is an integer number (103220595).

Almost surely, 2^389944453 is an apocalyptic number.

It is an amenable number.

389944453 is a deficient number, since it is larger than the sum of its proper divisors (22937927).

389944453 is a wasteful number, since it uses less digits than its factorization.

389944453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22937926.

The product of its digits is 1866240, while the sum is 49.

The square root of 389944453 is about 19747.0112422108. The cubic root of 389944453 is about 730.5796690622.

The spelling of 389944453 in words is "three hundred eighty-nine million, nine hundred forty-four thousand, four hundred fifty-three".