64573420 has 48 divisors (see below), whose sum is σ = 142349760. Its totient is φ = 24558336.

The previous prime is 64573393. The next prime is 64573427. The reversal of 64573420 is 2437546.

It is not an unprimeable number, because it can be changed into a prime (64573427) 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, 105034 + ... + 105646.

It is an arithmetic number, because the mean of its divisors is an integer number (2965620).

Almost surely, 2^64573420 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 64573420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71174880).

64573420 is an abundant number, since it is smaller than the sum of its proper divisors (77776340).

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

64573420 is a wasteful number, since it uses less digits than its factorization.

64573420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 64573420 is about 8035.7588316226. The cubic root of 64573420 is about 401.1910748316.

The spelling of 64573420 in words is "sixty-four million, five hundred seventy-three thousand, four hundred twenty".