64055220 has 48 divisors (see below), whose sum is σ = 179843328. Its totient is φ = 17034880.

The previous prime is 64055209. The next prime is 64055221. The reversal of 64055220 is 2255046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64055221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24622 + ... + 27098.

It is an arithmetic number, because the mean of its divisors is an integer number (3746736).

Almost surely, 2^64055220 is an apocalyptic number.

64055220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64055220 is an abundant number, since it is smaller than the sum of its proper divisors (115788108).

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

64055220 is a wasteful number, since it uses less digits than its factorization.

64055220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920 (or 2918 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 64055220 is about 8003.4505058756. The cubic root of 64055220 is about 400.1150085961.

The spelling of 64055220 in words is "sixty-four million, fifty-five thousand, two hundred twenty".