65887240 has 32 divisors (see below), whose sum is σ = 156968280. Its totient is φ = 24804352.

The previous prime is 65887147. The next prime is 65887243. The reversal of 65887240 is 4278856.

65887240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 56040196 + 9847044 = 7486^2 + 3138^2 .

It is a super-2 number, since 2×65887240² = 8682256789635200, which contains 22 as substring.

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 = 65887193 and 65887202.

It is not an unprimeable number, because it can be changed into a prime (65887243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47767 + ... + 49126.

Almost surely, 2^65887240 is an apocalyptic number.

It is an amenable number.

65887240 is an abundant number, since it is smaller than the sum of its proper divisors (91081040).

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

65887240 is a wasteful number, since it uses less digits than its factorization.

65887240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96921 (or 96917 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 65887240 is about 8117.0955396620. The cubic root of 65887240 is about 403.8937242922.

The spelling of 65887240 in words is "sixty-five million, eight hundred eighty-seven thousand, two hundred forty".