620386605 has 54 divisors (see below), whose sum is σ = 1112786766. Its totient is φ = 319733856.

The previous prime is 620386603. The next prime is 620386609. The reversal of 620386605 is 506683026.

It can be written as a sum of positive squares in only one way, i.e., 496309284 + 124077321 = 22278^2 + 11139^2 .

It is not a de Polignac number, because 620386605 - 2¹ = 620386603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620386605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620386603) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 7852956 + ... + 7853034.

Almost surely, 2^620386605 is an apocalyptic number.

It is an amenable number.

620386605 is a deficient number, since it is larger than the sum of its proper divisors (492400161).

620386605 is an equidigital number, since it uses as much as digits as its factorization.

620386605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 620386605 is about 24907.5612013702. The cubic root of 620386605 is about 852.8790974254.

The spelling of 620386605 in words is "six hundred twenty million, three hundred eighty-six thousand, six hundred five".