620628228 has 72 divisors (see below), whose sum is σ = 1785865536. Its totient is φ = 179889600.

The previous prime is 620628191. The next prime is 620628287. The reversal of 620628228 is 822826026.

620628228 is a `hidden beast` number, since 6 + 2 + 0 + 628 + 2 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 620628192 and 620628201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24963 + ... + 43178.

It is an arithmetic number, because the mean of its divisors is an integer number (24803688).

Almost surely, 2^620628228 is an apocalyptic number.

It is an amenable number.

620628228 is an abundant number, since it is smaller than the sum of its proper divisors (1165237308).

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

620628228 is a wasteful number, since it uses less digits than its factorization.

620628228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68185 (or 68180 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 620628228 is about 24912.4111237752. The cubic root of 620628228 is about 852.9898071327.

The spelling of 620628228 in words is "six hundred twenty million, six hundred twenty-eight thousand, two hundred twenty-eight".