64878762 has 48 divisors (see below), whose sum is σ = 142037280. Its totient is φ = 19745856.

The previous prime is 64878743. The next prime is 64878763. The reversal of 64878762 is 26787846.

It is not an unprimeable number, because it can be changed into a prime (64878763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110233 + ... + 110819.

It is an arithmetic number, because the mean of its divisors is an integer number (2959110).

Almost surely, 2^64878762 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64878762, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71018640).

64878762 is an abundant number, since it is smaller than the sum of its proper divisors (77158518).

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

64878762 is a wasteful number, since it uses less digits than its factorization.

64878762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 714 counting only the distinct ones).

The product of its digits is 903168, while the sum is 48.

The square root of 64878762 is about 8054.7353774038. The cubic root of 64878762 is about 401.8224383527.

The spelling of 64878762 in words is "sixty-four million, eight hundred seventy-eight thousand, seven hundred sixty-two".