64339980 has 96 divisors (see below), whose sum is σ = 188697600. Its totient is φ = 16359168.

The previous prime is 64339943. The next prime is 64339981. The reversal of 64339980 is 8993346.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64339981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179041 + ... + 179399.

It is an arithmetic number, because the mean of its divisors is an integer number (1965600).

Almost surely, 2^64339980 is an apocalyptic number.

64339980 is a gapful number since it is divisible by the number (60) 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 64339980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94348800).

64339980 is an abundant number, since it is smaller than the sum of its proper divisors (124357620).

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

64339980 is a wasteful number, since it uses less digits than its factorization.

64339980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 64339980 is about 8021.2206053692. The cubic root of 64339980 is about 400.7070411623.

The spelling of 64339980 in words is "sixty-four million, three hundred thirty-nine thousand, nine hundred eighty".