620225138 has 8 divisors (see below), whose sum is σ = 1001902188. Its totient is φ = 286257744.

The previous prime is 620225131. The next prime is 620225149. The reversal of 620225138 is 831522026.

It can be written as a sum of positive squares in 2 ways, for example, as 551451289 + 68773849 = 23483^2 + 8293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 620225138.

It is not an unprimeable number, because it can be changed into a prime (620225131) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11927381 + ... + 11927432.

Almost surely, 2^620225138 is an apocalyptic number.

620225138 is a deficient number, since it is larger than the sum of its proper divisors (381677050).

620225138 is a wasteful number, since it uses less digits than its factorization.

620225138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23854828.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 620225138 is about 24904.3196654717. The cubic root of 620225138 is about 852.8050985258.

The spelling of 620225138 in words is "six hundred twenty million, two hundred twenty-five thousand, one hundred thirty-eight".