64011220 has 48 divisors (see below), whose sum is σ = 165449088. Its totient is φ = 20257920.

The previous prime is 64011217. The next prime is 64011271. The reversal of 64011220 is 2211046.

It is a junction number, because it is equal to n+sod(n) for n = 64011194 and 64011203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15766 + ... + 19405.

It is an arithmetic number, because the mean of its divisors is an integer number (3446856).

Almost surely, 2^64011220 is an apocalyptic number.

It is an amenable number.

64011220 is an abundant number, since it is smaller than the sum of its proper divisors (101437868).

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

64011220 is a wasteful number, since it uses less digits than its factorization.

64011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35200 (or 35198 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 64011220 is about 8000.7012192682. The cubic root of 64011220 is about 400.0233736342.

Adding to 64011220 its reverse (2211046), we get a palindrome (66222266).

The spelling of 64011220 in words is "sixty-four million, eleven thousand, two hundred twenty".