64728678 has 32 divisors (see below), whose sum is σ = 149425920. Its totient is φ = 18309600.

The previous prime is 64728637. The next prime is 64728679. The reversal of 64728678 is 87682746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64728679) 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 15 ways as a sum of consecutive naturals, for example, 3388 + ... + 11871.

It is an arithmetic number, because the mean of its divisors is an integer number (4669560).

Almost surely, 2^64728678 is an apocalyptic number.

64728678 is an abundant number, since it is smaller than the sum of its proper divisors (84697242).

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

64728678 is a wasteful number, since it uses less digits than its factorization.

64728678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15372.

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

The square root of 64728678 is about 8045.4134760123. The cubic root of 64728678 is about 401.5123539243.

The spelling of 64728678 in words is "sixty-four million, seven hundred twenty-eight thousand, six hundred seventy-eight".