64984680 has 160 divisors (see below), whose sum is σ = 225815040. Its totient is φ = 16744320.

The previous prime is 64984663. The next prime is 64984681. The reversal of 64984680 is 8648946.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (64984681) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 100117 + ... + 100763.

It is an arithmetic number, because the mean of its divisors is an integer number (1411344).

Almost surely, 2^64984680 is an apocalyptic number.

64984680 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 64984680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112907520).

64984680 is an abundant number, since it is smaller than the sum of its proper divisors (160830360).

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

64984680 is a wasteful number, since it uses less digits than its factorization.

64984680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 64984680 is about 8061.3075862418. The cubic root of 64984680 is about 402.0409849058.

The spelling of 64984680 in words is "sixty-four million, nine hundred eighty-four thousand, six hundred eighty".