64428578 has 8 divisors (see below), whose sum is σ = 96688080. Its totient is φ = 32199220.

The previous prime is 64428569. The next prime is 64428583. The reversal of 64428578 is 87582446.

64428578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088 + ... + 11403.

It is an arithmetic number, because the mean of its divisors is an integer number (12086010).

Almost surely, 2^64428578 is an apocalyptic number.

64428578 is a deficient number, since it is larger than the sum of its proper divisors (32259502).

64428578 is a wasteful number, since it uses less digits than its factorization.

64428578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15072.

The product of its digits is 430080, while the sum is 44.

The square root of 64428578 is about 8026.7414309918. The cubic root of 64428578 is about 400.8908851693.

The spelling of 64428578 in words is "sixty-four million, four hundred twenty-eight thousand, five hundred seventy-eight".