65943728 has 20 divisors (see below), whose sum is σ = 128235840. Its totient is φ = 32850624.

The previous prime is 65943707. The next prime is 65943733. The reversal of 65943728 is 82734956.

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, 3008 + ... + 11871.

It is an arithmetic number, because the mean of its divisors is an integer number (6411792).

Almost surely, 2^65943728 is an apocalyptic number.

It is an amenable number.

65943728 is a deficient number, since it is larger than the sum of its proper divisors (62292112).

65943728 is a wasteful number, since it uses less digits than its factorization.

65943728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15164 (or 15158 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 65943728 is about 8120.5743639228. The cubic root of 65943728 is about 404.0091165475.

The spelling of 65943728 in words is "sixty-five million, nine hundred forty-three thousand, seven hundred twenty-eight".