64528706 has 16 divisors (see below), whose sum is σ = 105941088. Its totient is φ = 29234400.

The previous prime is 64528699. The next prime is 64528721. The reversal of 64528706 is 60782546.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64528706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2201 + ... + 11571.

It is an arithmetic number, because the mean of its divisors is an integer number (6621318).

Almost surely, 2^64528706 is an apocalyptic number.

64528706 is a deficient number, since it is larger than the sum of its proper divisors (41412382).

64528706 is a wasteful number, since it uses less digits than its factorization.

64528706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9697.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 64528706 is about 8032.9761608012. The cubic root of 64528706 is about 401.0984515824.

The spelling of 64528706 in words is "sixty-four million, five hundred twenty-eight thousand, seven hundred six".