64728835 has 4 divisors (see below), whose sum is σ = 77674608. Its totient is φ = 51783064.

The previous prime is 64728793. The next prime is 64728857. The reversal of 64728835 is 53882746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64728835 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64728791 and 64728800.

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, 6472879 + ... + 6472888.

It is an arithmetic number, because the mean of its divisors is an integer number (19418652).

Almost surely, 2^64728835 is an apocalyptic number.

64728835 is a deficient number, since it is larger than the sum of its proper divisors (12945773).

64728835 is a wasteful number, since it uses less digits than its factorization.

64728835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12945772.

The product of its digits is 322560, while the sum is 43.

The square root of 64728835 is about 8045.4232331183. The cubic root of 64728835 is about 401.5126785480.

The spelling of 64728835 in words is "sixty-four million, seven hundred twenty-eight thousand, eight hundred thirty-five".