428389405 has 8 divisors (see below), whose sum is σ = 514305792. Its totient is φ = 342552528.

The previous prime is 428389399. The next prime is 428389411. The reversal of 428389405 is 504983824.

It is an interprime number because it is at equal distance from previous prime (428389399) and next prime (428389411).

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 428389405 - 2¹⁹ = 427865117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7297 + ... + 30166.

It is an arithmetic number, because the mean of its divisors is an integer number (64288224).

Almost surely, 2^428389405 is an apocalyptic number.

It is an amenable number.

428389405 is a deficient number, since it is larger than the sum of its proper divisors (85916387).

428389405 is a wasteful number, since it uses less digits than its factorization.

428389405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39755.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 428389405 is about 20697.5700264548. The cubic root of 428389405 is about 753.8406867428.

The spelling of 428389405 in words is "four hundred twenty-eight million, three hundred eighty-nine thousand, four hundred five".