65768440 has 32 divisors (see below), whose sum is σ = 148236480. Its totient is φ = 26261632.

The previous prime is 65768413. The next prime is 65768447. The reversal of 65768440 is 4486756.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 65768393 and 65768402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65768447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30849 + ... + 32911.

It is an arithmetic number, because the mean of its divisors is an integer number (4632390).

Almost surely, 2^65768440 is an apocalyptic number.

It is an amenable number.

65768440 is an abundant number, since it is smaller than the sum of its proper divisors (82468040).

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

65768440 is a wasteful number, since it uses less digits than its factorization.

65768440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871 (or 2867 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 65768440 is about 8109.7743495118. The cubic root of 65768440 is about 403.6508272751.

The spelling of 65768440 in words is "sixty-five million, seven hundred sixty-eight thousand, four hundred forty".