64940484 has 72 divisors (see below), whose sum is σ = 177539040. Its totient is φ = 18420864.

The previous prime is 64940471. The next prime is 64940489. The reversal of 64940484 is 48404946.

It is not an unprimeable number, because it can be changed into a prime (64940489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104944 + ... + 105560.

It is an arithmetic number, because the mean of its divisors is an integer number (2465820).

Almost surely, 2^64940484 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 64940484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88769520).

64940484 is an abundant number, since it is smaller than the sum of its proper divisors (112598556).

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

64940484 is a wasteful number, since it uses less digits than its factorization.

64940484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 64940484 is about 8058.5658773755. The cubic root of 64940484 is about 401.9498217115.

The spelling of 64940484 in words is "sixty-four million, nine hundred forty thousand, four hundred eighty-four".