64309788 has 60 divisors (see below), whose sum is σ = 170484160. Its totient is φ = 21135168.

The previous prime is 64309787. The next prime is 64309807. The reversal of 64309788 is 88790346.

It is a happy number.

64309788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64309783) 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 19 ways as a sum of consecutive naturals, for example, 22293 + ... + 25011.

Almost surely, 2^64309788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64309788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85242080).

64309788 is an abundant number, since it is smaller than the sum of its proper divisors (106174372).

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

64309788 is a wasteful number, since it uses less digits than its factorization.

64309788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808 (or 2797 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 64309788 is about 8019.3383766992. The cubic root of 64309788 is about 400.6443531319.

The spelling of 64309788 in words is "sixty-four million, three hundred nine thousand, seven hundred eighty-eight".