428510389 has 2 divisors, whose sum is σ = 428510390. Its totient is φ = 428510388.

The previous prime is 428510387. The next prime is 428510399. The reversal of 428510389 is 983015824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242051364 + 186459025 = 15558^2 + 13655^2 .

It is a cyclic number.

It is not a de Polignac number, because 428510389 - 2¹ = 428510387 is a prime.

It is a super-3 number, since 3×428510389³ (a number of 27 digits) contains 333 as substring.

Together with 428510387, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428510387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214255194 + 214255195.

It is an arithmetic number, because the mean of its divisors is an integer number (214255195).

Almost surely, 2^428510389 is an apocalyptic number.

It is an amenable number.

428510389 is a deficient number, since it is larger than the sum of its proper divisors (1).

428510389 is an equidigital number, since it uses as much as digits as its factorization.

428510389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 428510389 is about 20700.4924820643. The cubic root of 428510389 is about 753.9116456074.

The spelling of 428510389 in words is "four hundred twenty-eight million, five hundred ten thousand, three hundred eighty-nine".