64028705 has 8 divisors (see below), whose sum is σ = 82744872. Its totient is φ = 47282688.

The previous prime is 64028687. The next prime is 64028719. The reversal of 64028705 is 50782046.

It can be written as a sum of positive squares in 4 ways, for example, as 3297856 + 60730849 = 1816^2 + 7793^2 .

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 64028705 - 2⁶ = 64028641 is a prime.

It is a Duffinian number.

It is a Curzon 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, 492464 + ... + 492593.

It is an arithmetic number, because the mean of its divisors is an integer number (10343109).

Almost surely, 2^64028705 is an apocalyptic number.

64028705 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64028705 is a deficient number, since it is larger than the sum of its proper divisors (18716167).

64028705 is a wasteful number, since it uses less digits than its factorization.

64028705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985075.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 64028705 is about 8001.7938613788. The cubic root of 64028705 is about 400.0597931448.

The spelling of 64028705 in words is "sixty-four million, twenty-eight thousand, seven hundred five".