65026440 has 48 divisors (see below), whose sum is σ = 211337100. Its totient is φ = 17340288.

The previous prime is 65026387. The next prime is 65026453. The reversal of 65026440 is 4462056.

It is a happy number.

65026440 is a `hidden beast` number, since 650 + 2 + 6 + 4 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 58706244 + 6320196 = 7662^2 + 2514^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89955 + ... + 90674.

Almost surely, 2^65026440 is an apocalyptic number.

65026440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65026440 is an abundant number, since it is smaller than the sum of its proper divisors (146310660).

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

65026440 is a wasteful number, since it uses less digits than its factorization.

65026440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180646 (or 180639 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 65026440 is about 8063.8973207749. The cubic root of 65026440 is about 402.1270853861.

Adding to 65026440 its reverse (4462056), we get a palindrome (69488496).

The spelling of 65026440 in words is "sixty-five million, twenty-six thousand, four hundred forty".