65047940 has 12 divisors (see below), whose sum is σ = 136600716. Its totient is φ = 26019168.

The previous prime is 65047937. The next prime is 65047987. The reversal of 65047940 is 4974056.

It can be written as a sum of positive squares in 2 ways, for example, as 34951744 + 30096196 = 5912^2 + 5486^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65047940.

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 3 ways as a sum of consecutive naturals, for example, 1626179 + ... + 1626218.

It is an arithmetic number, because the mean of its divisors is an integer number (11383393).

Almost surely, 2^65047940 is an apocalyptic number.

It is an amenable number.

65047940 is an abundant number, since it is smaller than the sum of its proper divisors (71552776).

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

65047940 is a wasteful number, since it uses less digits than its factorization.

65047940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252406 (or 3252404 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 65047940 is about 8065.2303128925. The cubic root of 65047940 is about 402.1713995638.

The spelling of 65047940 in words is "sixty-five million, forty-seven thousand, nine hundred forty".