389747405 has 8 divisors (see below), whose sum is σ = 468131352. Its totient is φ = 311508288.

The previous prime is 389747387. The next prime is 389747431. The reversal of 389747405 is 504747983.

It can be written as a sum of positive squares in 4 ways, for example, as 96550276 + 293197129 = 9826^2 + 17123^2 .

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 389747405 - 2⁶ = 389747341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 389747405.

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, 30194 + ... + 41123.

It is an arithmetic number, because the mean of its divisors is an integer number (58516419).

Almost surely, 2^389747405 is an apocalyptic number.

It is an amenable number.

389747405 is a deficient number, since it is larger than the sum of its proper divisors (78383947).

389747405 is a wasteful number, since it uses less digits than its factorization.

389747405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72415.

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 389747405 is about 19742.0212997555. The cubic root of 389747405 is about 730.4565886961.

The spelling of 389747405 in words is "three hundred eighty-nine million, seven hundred forty-seven thousand, four hundred five".