620822420 has 12 divisors (see below), whose sum is σ = 1303727124. Its totient is φ = 248328960.

The previous prime is 620822393. The next prime is 620822467. The reversal of 620822420 is 24228026.

It can be written as a sum of positive squares in 2 ways, for example, as 128958736 + 491863684 = 11356^2 + 22178^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 620822420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15520541 + ... + 15520580.

It is an arithmetic number, because the mean of its divisors is an integer number (108643927).

Almost surely, 2^620822420 is an apocalyptic number.

It is an amenable number.

620822420 is an abundant number, since it is smaller than the sum of its proper divisors (682904704).

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

620822420 is a wasteful number, since it uses less digits than its factorization.

620822420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31041130 (or 31041128 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 620822420 is about 24916.3083140340. The cubic root of 620822420 is about 853.0787635137.

The spelling of 620822420 in words is "six hundred twenty million, eight hundred twenty-two thousand, four hundred twenty".