65428559 has 16 divisors (see below), whose sum is σ = 77469696. Its totient is φ = 54096000.

The previous prime is 65428549. The next prime is 65428577. The reversal of 65428559 is 95582456.

It is a de Polignac number, because none of the positive numbers 2^k-65428559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65428549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21959 + ... + 24759.

It is an arithmetic number, because the mean of its divisors is an integer number (4841856).

Almost surely, 2^65428559 is an apocalyptic number.

65428559 is a deficient number, since it is larger than the sum of its proper divisors (12041137).

65428559 is a wasteful number, since it uses less digits than its factorization.

65428559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926.

The product of its digits is 432000, while the sum is 44.

The square root of 65428559 is about 8088.7921842510. The cubic root of 65428559 is about 402.9542912732.

The spelling of 65428559 in words is "sixty-five million, four hundred twenty-eight thousand, five hundred fifty-nine".