64197828 has 18 divisors (see below), whose sum is σ = 162277934. Its totient is φ = 21399264.

The previous prime is 64197811. The next prime is 64197863. The reversal of 64197828 is 82879146.

64197828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 51581124 + 12616704 = 7182^2 + 3552^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×64197828² = 8242722239835168, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 891601 + ... + 891672.

Almost surely, 2^64197828 is an apocalyptic number.

It is an amenable number.

64197828 is an abundant number, since it is smaller than the sum of its proper divisors (98080106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64197828 is a wasteful number, since it uses less digits than its factorization.

64197828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783283 (or 1783278 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 64197828 is about 8012.3547100712. The cubic root of 64197828 is about 400.4117177425.

It can be divided in two parts, 64197 and 828, that added together give a square (65025 = 255²).

The spelling of 64197828 in words is "sixty-four million, one hundred ninety-seven thousand, eight hundred twenty-eight".