65707928 has 64 divisors (see below), whose sum is σ = 152409600. Its totient is φ = 26110080.

The previous prime is 65707921. The next prime is 65707937. The reversal of 65707928 is 82970756.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65707921) 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, 20225 + ... + 23247.

It is an arithmetic number, because the mean of its divisors is an integer number (2381400).

Almost surely, 2^65707928 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 65707928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76204800).

65707928 is an abundant number, since it is smaller than the sum of its proper divisors (86701672).

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

65707928 is a wasteful number, since it uses less digits than its factorization.

65707928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072 (or 3068 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 65707928 is about 8106.0426843189. The cubic root of 65707928 is about 403.5269927335.

The spelling of 65707928 in words is "sixty-five million, seven hundred seven thousand, nine hundred twenty-eight".