620564436 has 24 divisors (see below), whose sum is σ = 1608871040. Its totient is φ = 206854776.

The previous prime is 620564431. The next prime is 620564437. The reversal of 620564436 is 634465026.

620564436 is a `hidden beast` number, since 6 + 2 + 0 + 5 + 644 + 3 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 620564436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620564431) 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 7 ways as a sum of consecutive naturals, for example, 2872876 + ... + 2873091.

Almost surely, 2^620564436 is an apocalyptic number.

It is an amenable number.

620564436 is an abundant number, since it is smaller than the sum of its proper divisors (988306604).

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

620564436 is a wasteful number, since it uses less digits than its factorization.

620564436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5745980 (or 5745972 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 620564436 is about 24911.1307651821. The cubic root of 620564436 is about 852.9605809456.

The spelling of 620564436 in words is "six hundred twenty million, five hundred sixty-four thousand, four hundred thirty-six".