620445222 has 72 divisors (see below), whose sum is σ = 1414395840. Its totient is φ = 196344000.

The previous prime is 620445211. The next prime is 620445233. The reversal of 620445222 is 222544026.

It is a happy number.

620445222 is a `hidden beast` number, since 6 + 204 + 452 + 2 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (620445211) and next prime (620445233).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5692104 + ... + 5692212.

Almost surely, 2^620445222 is an apocalyptic number.

620445222 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 620445222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (707197920).

620445222 is an abundant number, since it is smaller than the sum of its proper divisors (793950618).

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

620445222 is a wasteful number, since it uses less digits than its factorization.

620445222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 620445222 is about 24908.7378644523. The cubic root of 620445222 is about 852.9059579020.

Adding to 620445222 its reverse (222544026), we get a palindrome (842989248).

The spelling of 620445222 in words is "six hundred twenty million, four hundred forty-five thousand, two hundred twenty-two".