64671028 has 6 divisors (see below), whose sum is σ = 113174306. Its totient is φ = 32335512.

The previous prime is 64671023. The next prime is 64671029. The reversal of 64671028 is 82017646.

It can be written as a sum of positive squares in only one way, i.e., 55980324 + 8690704 = 7482^2 + 2948^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64670984 and 64671002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64671023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8083875 + ... + 8083882.

Almost surely, 2^64671028 is an apocalyptic number.

It is an amenable number.

64671028 is a deficient number, since it is larger than the sum of its proper divisors (48503278).

64671028 is a wasteful number, since it uses less digits than its factorization.

64671028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16167761 (or 16167759 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 64671028 is about 8041.8298912623. The cubic root of 64671028 is about 401.3931174268.

The spelling of 64671028 in words is "sixty-four million, six hundred seventy-one thousand, twenty-eight".