65428 has 12 divisors (see below), whose sum is σ = 124992. Its totient is φ = 29720.

The previous prime is 65423. The next prime is 65437. The reversal of 65428 is 82456.

It is a plaindrome in base 15.

It is a nialpdrome in base 4 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65423) by changing a digit.

65428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700 + ... + 787.

It is an arithmetic number, because the mean of its divisors is an integer number (10416).

2⁶⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

65428 is a deficient number, since it is larger than the sum of its proper divisors (59564).

65428 is a wasteful number, since it uses less digits than its factorization.

65428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502 (or 1500 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 65428 is about 255.7889755247. The cubic root of 65428 is about 40.2953143700.

The spelling of 65428 in words is "sixty-five thousand, four hundred twenty-eight".