65404728 has 48 divisors (see below), whose sum is σ = 178256520. Its totient is φ = 21663936.

The previous prime is 65404721. The next prime is 65404741. The reversal of 65404728 is 82740456.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 65404692 and 65404701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65404721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8950 + ... + 14522.

Almost surely, 2^65404728 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 65404728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89128260).

65404728 is an abundant number, since it is smaller than the sum of its proper divisors (112851792).

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

65404728 is a wasteful number, since it uses less digits than its factorization.

65404728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5748 (or 5741 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 65404728 is about 8087.3189624251. The cubic root of 65404728 is about 402.9053627422.

The spelling of 65404728 in words is "sixty-five million, four hundred four thousand, seven hundred twenty-eight".