620801220 has 72 divisors (see below), whose sum is σ = 1882270656. Its totient is φ = 152810112.

The previous prime is 620801201. The next prime is 620801227. The reversal of 620801220 is 22108026.

It is not an unprimeable number, because it can be changed into a prime (620801227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20472 + ... + 40751.

It is an arithmetic number, because the mean of its divisors is an integer number (26142648).

Almost surely, 2^620801220 is an apocalyptic number.

620801220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620801220 is an abundant number, since it is smaller than the sum of its proper divisors (1261469436).

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

620801220 is a wasteful number, since it uses less digits than its factorization.

620801220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61261 (or 61246 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 620801220 is about 24915.8828862234. The cubic root of 620801220 is about 853.0690530205.

Adding to 620801220 its reverse (22108026), we get a palindrome (642909246).

The spelling of 620801220 in words is "six hundred twenty million, eight hundred one thousand, two hundred twenty".