65040385 has 8 divisors (see below), whose sum is σ = 82639656. Its totient is φ = 48971520.

The previous prime is 65040379. The next prime is 65040499. The reversal of 65040385 is 58304056.

It can be written as a sum of positive squares in 4 ways, for example, as 30735936 + 34304449 = 5544^2 + 5857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65040385 - 2²¹ = 62943233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382506 + ... + 382675.

It is an arithmetic number, because the mean of its divisors is an integer number (10329957).

Almost surely, 2^65040385 is an apocalyptic number.

It is an amenable number.

65040385 is a deficient number, since it is larger than the sum of its proper divisors (17599271).

65040385 is a wasteful number, since it uses less digits than its factorization.

65040385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765203.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 65040385 is about 8064.7619307702. The cubic root of 65040385 is about 402.1558288808.

The spelling of 65040385 in words is "sixty-five million, forty thousand, three hundred eighty-five".