65428992 has 80 divisors (see below), whose sum is σ = 193715280. Its totient is φ = 21805056.

The previous prime is 65428991. The next prime is 65429009. The reversal of 65428992 is 29982456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65428991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11458 + ... + 16190.

It is an arithmetic number, because the mean of its divisors is an integer number (2421441).

Almost surely, 2^65428992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65428992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96857640).

65428992 is an abundant number, since it is smaller than the sum of its proper divisors (128286288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65428992 is an equidigital number, since it uses as much as digits as its factorization.

65428992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4760 (or 4738 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 65428992 is about 8088.8189496366. The cubic root of 65428992 is about 402.9551801756.

It can be divided in two parts, 654 and 28992, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 65428992 in words is "sixty-five million, four hundred twenty-eight thousand, nine hundred ninety-two".