64323980 has 48 divisors (see below), whose sum is σ = 157308480. Its totient is φ = 21635328.

The previous prime is 64323979. The next prime is 64323989. The reversal of 64323980 is 8932346.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 64323980.

It is not an unprimeable number, because it can be changed into a prime (64323989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3086 + ... + 11754.

It is an arithmetic number, because the mean of its divisors is an integer number (3277260).

Almost surely, 2^64323980 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 64323980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78654240).

64323980 is an abundant number, since it is smaller than the sum of its proper divisors (92984500).

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

64323980 is a wasteful number, since it uses less digits than its factorization.

64323980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8738 (or 8736 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 64323980 is about 8020.2231889144. The cubic root of 64323980 is about 400.6738226037.

The spelling of 64323980 in words is "sixty-four million, three hundred twenty-three thousand, nine hundred eighty".