620221970 has 16 divisors (see below), whose sum is σ = 1126281240. Its totient is φ = 245892864.

The previous prime is 620221963. The next prime is 620222017. The reversal of 620221970 is 79122026.

It can be written as a sum of positive squares in 4 ways, for example, as 485453089 + 134768881 = 22033^2 + 11609^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273305 + ... + 275564.

Almost surely, 2^620221970 is an apocalyptic number.

620221970 is a deficient number, since it is larger than the sum of its proper divisors (506059270).

620221970 is a wasteful number, since it uses less digits than its factorization.

620221970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548989.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 620221970 is about 24904.2560619666. The cubic root of 620221970 is about 852.8036465309.

Adding to 620221970 its reverse (79122026), we get a palindrome (699343996).

The spelling of 620221970 in words is "six hundred twenty million, two hundred twenty-one thousand, nine hundred seventy".