64423020 has 24 divisors (see below), whose sum is σ = 180384624. Its totient is φ = 17179456.

The previous prime is 64423019. The next prime is 64423027. The reversal of 64423020 is 2032446.

64423020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64423027) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 536799 + ... + 536918.

It is an arithmetic number, because the mean of its divisors is an integer number (7516026).

Almost surely, 2^64423020 is an apocalyptic number.

64423020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64423020 is an abundant number, since it is smaller than the sum of its proper divisors (115961604).

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

64423020 is a wasteful number, since it uses less digits than its factorization.

64423020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073729 (or 1073727 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 64423020 is about 8026.3952058194. The cubic root of 64423020 is about 400.8793570779.

Adding to 64423020 its reverse (2032446), we get a palindrome (66455466).

The spelling of 64423020 in words is "sixty-four million, four hundred twenty-three thousand, twenty".