428123065 has 8 divisors (see below), whose sum is σ = 517670208. Its totient is φ = 339883440.

The previous prime is 428123021. The next prime is 428123077. The reversal of 428123065 is 560321824.

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

It is not a de Polignac number, because 428123065 - 2⁹ = 428122553 is a prime.

It is a Duffinian 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, 326157 + ... + 327466.

It is an arithmetic number, because the mean of its divisors is an integer number (64708776).

Almost surely, 2^428123065 is an apocalyptic number.

It is an amenable number.

428123065 is a deficient number, since it is larger than the sum of its proper divisors (89547143).

428123065 is a wasteful number, since it uses less digits than its factorization.

428123065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653759.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 428123065 is about 20691.1349374557. The cubic root of 428123065 is about 753.6844273909.

Adding to 428123065 its reverse (560321824), we get a palindrome (988444889).

The spelling of 428123065 in words is "four hundred twenty-eight million, one hundred twenty-three thousand, sixty-five".