65288381 has 8 divisors (see below), whose sum is σ = 69963264. Its totient is φ = 60706240.

The previous prime is 65288371. The next prime is 65288401. The reversal of 65288381 is 18388256.

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

It is a cyclic number.

It is not a de Polignac number, because 65288381 - 2⁶ = 65288317 is a prime.

It is a super-2 number, since 2×65288381² = 8525145387202322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65288371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21725 + ... + 24546.

It is an arithmetic number, because the mean of its divisors is an integer number (8745408).

Almost surely, 2^65288381 is an apocalyptic number.

It is an amenable number.

65288381 is a deficient number, since it is larger than the sum of its proper divisors (4674883).

65288381 is a wasteful number, since it uses less digits than its factorization.

65288381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46371.

The product of its digits is 92160, while the sum is 41.

The square root of 65288381 is about 8080.1225857038. The cubic root of 65288381 is about 402.6663145101. Note that the first 3 decimals are identical.

The spelling of 65288381 in words is "sixty-five million, two hundred eighty-eight thousand, three hundred eighty-one".