64500028 has 24 divisors (see below), whose sum is σ = 117037872. Its totient is φ = 31077504.

The previous prime is 64500001. The next prime is 64500049. The reversal of 64500028 is 82000546.

64500028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64500028² = 8320507224001568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64499975 and 64500011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13800 + ... + 17872.

It is an arithmetic number, because the mean of its divisors is an integer number (4876578).

Almost surely, 2^64500028 is an apocalyptic number.

It is an amenable number.

64500028 is a deficient number, since it is larger than the sum of its proper divisors (52537844).

64500028 is a wasteful number, since it uses less digits than its factorization.

64500028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221 (or 4219 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 64500028 is about 8031.1909453082. The cubic root of 64500028 is about 401.0390237373.

The spelling of 64500028 in words is "sixty-four million, five hundred thousand, twenty-eight".