64228788 has 216 divisors, whose sum is σ = 201434688. Its totient is φ = 17791488.

The previous prime is 64228763. The next prime is 64228789. The reversal of 64228788 is 88782246.

It is a happy number.

64228788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64228789) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 2792545 + ... + 2792567.

It is an arithmetic number, because the mean of its divisors is an integer number (932568).

Almost surely, 2^64228788 is an apocalyptic number.

64228788 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64228788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100717344).

64228788 is an abundant number, since it is smaller than the sum of its proper divisors (137205900).

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

64228788 is a wasteful number, since it uses less digits than its factorization.

64228788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 58 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 64228788 is about 8014.2864935065. The cubic root of 64228788 is about 400.4760748238.

The spelling of 64228788 in words is "sixty-four million, two hundred twenty-eight thousand, seven hundred eighty-eight".