65228040 has 192 divisors, whose sum is σ = 224078400. Its totient is φ = 16436736.

The previous prime is 65228039. The next prime is 65228041. The reversal of 65228040 is 4082256.

65228040 is a `hidden beast` number, since 652 + 2 + 8 + 0 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (65228039) and next prime (65228041).

It is a junction number, because it is equal to n+sod(n) for n = 65227995 and 65228013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65228041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 785839 + ... + 785921.

It is an arithmetic number, because the mean of its divisors is an integer number (1167075).

Almost surely, 2^65228040 is an apocalyptic number.

65228040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65228040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112039200).

65228040 is an abundant number, since it is smaller than the sum of its proper divisors (158850360).

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

65228040 is a wasteful number, since it uses less digits than its factorization.

65228040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 65228040 is about 8076.3878064392. The cubic root of 65228040 is about 402.5422251652.

The spelling of 65228040 in words is "sixty-five million, two hundred twenty-eight thousand, forty".