220640652 has 24 divisors (see below), whose sum is σ = 572031600. Its totient is φ = 73546848.

The previous prime is 220640647. The next prime is 220640659. The reversal of 220640652 is 256046022.

220640652 is a `hidden beast` number, since 2 + 2 + 0 + 6 + 4 + 0 + 652 = 666.

220640652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (220640659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021377 + ... + 1021592.

It is an arithmetic number, because the mean of its divisors is an integer number (23834650).

Almost surely, 2^220640652 is an apocalyptic number.

It is an amenable number.

220640652 is an abundant number, since it is smaller than the sum of its proper divisors (351390948).

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

220640652 is a wasteful number, since it uses less digits than its factorization.

220640652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042982 (or 2042974 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 220640652 is about 14853.9776491013. The cubic root of 220640652 is about 604.2664898639.

Adding to 220640652 its reverse (256046022), we get a palindrome (476686674).

The spelling of 220640652 in words is "two hundred twenty million, six hundred forty thousand, six hundred fifty-two".