65130440 has 16 divisors (see below), whose sum is σ = 146543580. Its totient is φ = 26052160.

The previous prime is 65130431. The next prime is 65130463. The reversal of 65130440 is 4403156.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 57851236 + 7279204 = 7606^2 + 2698^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814091 + ... + 814170.

Almost surely, 2^65130440 is an apocalyptic number.

It is an amenable number.

65130440 is an abundant number, since it is smaller than the sum of its proper divisors (81413140).

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

65130440 is a wasteful number, since it uses less digits than its factorization.

65130440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628272 (or 1628268 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 65130440 is about 8070.3432392929. The cubic root of 65130440 is about 402.3413517732.

Adding to 65130440 its reverse (4403156), we get a palindrome (69533596).

The spelling of 65130440 in words is "sixty-five million, one hundred thirty thousand, four hundred forty".