65728619 has 8 divisors (see below), whose sum is σ = 75478080. Its totient is φ = 56608200.

The previous prime is 65728603. The next prime is 65728631. The reversal of 65728619 is 91682756.

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

It is not a de Polignac number, because 65728619 - 2⁴ = 65728603 is a prime.

It is a super-2 number, since 2×65728619² = 8640502711294322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65728619.

It is not an unprimeable number, because it can be changed into a prime (65721619) 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, 157037 + ... + 157454.

It is an arithmetic number, because the mean of its divisors is an integer number (9434760).

Almost surely, 2^65728619 is an apocalyptic number.

65728619 is a deficient number, since it is larger than the sum of its proper divisors (9749461).

65728619 is a wasteful number, since it uses less digits than its factorization.

65728619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314521.

The product of its digits is 181440, while the sum is 44.

The square root of 65728619 is about 8107.3188539739. The cubic root of 65728619 is about 403.5693442986.

The spelling of 65728619 in words is "sixty-five million, seven hundred twenty-eight thousand, six hundred nineteen".